CN114757753A

CN114757753A - Method and device for evaluating financial affairs of listed company, storage medium and electronic equipment

Info

Publication number: CN114757753A
Application number: CN202110843779.3A
Authority: CN
Inventors: 林杉
Original assignee: Shanghai Yushi Internet Financial Information Service Co ltd
Current assignee: Shanghai Yushi Internet Financial Information Service Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2022-07-15

Abstract

The invention provides a financial evaluation method and an evaluation device for a listed company, a storage medium and electronic equipment. The listed company financial evaluation method comprises the following steps: acquiring an asset liability statement of a listed company; classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of the listed companies based on data of liabilities in the balance sheet and owner equity title; and inputting the asset strategy category and/or the financing structure category which the listed company belongs to into a pre-trained financial evaluation model, so that the financial evaluation model outputs the financial evaluation result of the listed company. The invention quantitatively connects the internal and active strategic targets of the listed company with the external and passive investment values of the listed company for the first time, thereby more comprehensively evaluating the profit, growth and value creation planned by the management layer to the extent that the listed company realizes the profit, growth and value creation.

Description

Method and device for evaluating financial affairs of listed company, storage medium and electronic equipment

Technical Field

The invention relates to the technical field of internet finance, in particular to a financial evaluation method, an evaluation device, a storage medium and electronic equipment for listed companies.

Background

The financial evaluation means that according to the current national finance and tax system and price system, the financial benefits and expenses of the calculation project are analyzed, financial statements are compiled, financial indexes are calculated, the profit capacity and the settlement capacity of the project are investigated, and the financial feasibility is judged. In financial evaluation for marketed companies, profitability and growth capacity of the enterprise are often considered, and the long-term utility of the enterprise on itself, investors and social responsibility is sought to be maximized.

The traditional foreign financial evaluation method mainly comprises a DuPont financial evaluation system and a Waler proportion scoring method. Among them, the DuPont Analysis (DuPont Analysis) comprehensively analyzes the financial status of an enterprise using the relationship between several major financial ratios, namely:

ROE (net asset profitability) ═ NPM (net sale profitability) × AU (asset turnover rate) × EM (equity multiplier)

Generally speaking, it is a classic method for evaluating the profitability and return level of equity benefits of a company and evaluating the performance of the company from a financial point of view. By adopting the method, the financial ratio analysis layer is clearer and the arrangement is more prominent, and convenience is provided for report analysts to comprehensively and carefully know the operation and profit conditions of enterprises.

The woll weight scoring method is a method of combining selected financial ratios in a linear relationship, respectively giving respective score weights, and then comparing the score weights with standard ratios to determine the scores of each index and the cumulative score of the overall index, thereby evaluating the credit level of the enterprise. This method, although imperfect, greatly improves the comparability of the results and also has good ductility. On the basis, the academic world develops and presents richer financial evaluation methods such as balance score card, economic added value, performance measurement of supply chain and the like.

The initiation of the domestic financial evaluation is later. On day 1 of 6 month in 1999, the ministry of finance, the national economic and trade Committee, the ministry of personnel and the national development plan Committee jointly issued documents such as the "evaluation rules of performance of national property funds" and the "detailed rules of performance evaluation operations of national property funds", and established a system of performance bargaining of national property funds. The model divides the whole index system into three levels, which are composed of 32 basic indexes, correction indexes and review indexes, and comprehensively evaluates the operation performance of the national enterprises by using an efficacy coefficient method so as to assess the performance condition of entrusted responsibility of the operators and get a hook about the evaluation result, salary and promotion.

After 2002, the index system is changed from 32 items to 24 items. The revised evaluation system expands the application field of the evaluation system on one hand and is popularized from nationally owned enterprises to general enterprises; on the other hand, the index system is more scientific and reasonable on the basis of simplification.

However, it should be understood that all the mainstream financial evaluation methods at home and abroad are evaluations performed by stakeholders outside the enterprise on the enterprise, and the emphasis is on the evaluation results, and the management effect is the feedback value of the results, that is, according to the evaluation results, the experience of successful enterprise management is summarized, and the reason of gap generation is analyzed, so that references are provided for the enterprise to strengthen management and improve the performance in the future. Therefore, all the mainstream financial evaluation methods at home and abroad cannot unify the performance formation process of the enterprise with the value creation and strategic target of the enterprise. However, if the business needs to search for financial evaluation based on its own specific strategic objectives, the business will logically depart from the category of quantitative statistics, and thus, the business lacks comparability and predictability.

In summary, the current market is still blank in terms of financial evaluation of enterprises and consideration of strategic targets and creative methods of the enterprises.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a method, an apparatus, a storage medium, and an electronic device for marketable corporate financial evaluation, which solve the above-mentioned deficiencies of the prior art.

To achieve the above and other related objects, the present invention provides a method for financial evaluation by a listed company, comprising: acquiring an asset liability statement of a listed company; classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of the listed companies based on data of liabilities in the balance sheet and owner equity title; and inputting the asset strategy category and/or the financing structure category which the listed company belongs to into a pre-trained financial evaluation model, so that the financial evaluation model outputs the financial evaluation result of the listed company.

In an embodiment of the invention, the financial evaluation model includes: a multi-factor model; the inputs to the financial evaluation model further include: the enterprise size and the industry of the listed company; and the financial evaluation model outputs financial index data of the listed company according to the enterprise scale, the affiliated industry, the asset strategy category and the financing structure category of the listed company.

In an embodiment of the present invention, the financial index data includes: profitability, profitability quality, growth capacity, and/or operational efficiency.

In an embodiment of the present invention, the classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement includes: carrying out classified statistics on the data of the asset subjects in the balance sheet of the listed company according to the management category and the investment category; and classifying the asset strategy of the listed company according to the proportion of each type of statistical result in the total assets.

In an embodiment of the present invention, the classification of the asset strategy includes: dominant class of management assets, dominant class of investment assets, and heavy classification of management and investment.

In an embodiment of the present invention, the classifying the financing structure of the listed company based on the data of the liabilities in the balance sheet and the owner equity subjects includes: carrying out classified statistics on the liabilities in the balance sheet of the listed company and the data of the equity subjects of the owners according to the operational liabilities, the financial liabilities, the stockholder income and the accumulated profits; and classifying the financing structure of the listed company according to the proportion of each type of statistical result in the total liability.

In an embodiment of the present invention, the classifying of the financing structure comprises: an operations driver, a debt financing driver, a stockholder financing driver, and a profit driver.

To achieve the above and other related objects, the present invention provides a financial evaluation apparatus for a listed company, comprising: the acquisition module is used for acquiring an asset liability statement of a listed company; the classification module is used for classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of the listed companies based on data of liabilities in the balance sheet and owner equity title; and the evaluation module is used for inputting the asset strategy category and/or the financing structure category which the listed company belongs to into a pre-trained financial evaluation model so that the financial evaluation model can output the financial evaluation result of the listed company.

To achieve the above and other related objects, the present invention provides a computer-readable storage medium, in which a computer program is stored, which, when being loaded and executed by a processor, implements the above-mentioned method.

To achieve the above and other related objects, the present invention provides an electronic device, comprising: a processor and a memory; wherein the memory is for storing a computer program; the processor is configured to load and execute the computer program to cause the electronic device to perform the method described above.

As described above, the financial evaluation method, the evaluation apparatus, the storage medium, and the electronic device of the present invention quantitatively link the active strategic target inside the listed company with the passive investment value outside the listed company for the first time, so as to more fully evaluate how much the listed company achieves the profit, growth, and value creation planned by the management layer, rather than only paying attention to the potential investment profit and loss from the perspective of the external investor.

In addition, after the invention "defines" the strategy of assets and financing structure of the listed company through the balance sheet, the two labels can be combined with other mature models related to enterprise evaluation in a similar way to thicken the value of the latter, so that the invention has strong universality.

Drawings

Fig. 1 is a schematic flow chart of a financial evaluation method of a listed company according to an embodiment of the present invention.

Fig. 2 is a diagram of a display interface showing the results of an asset strategy in an embodiment of the present invention.

FIG. 3 is a diagram of a display interface showing the financing structure results in accordance with an embodiment of the present invention.

FIG. 4 is a display interface diagram illustrating the profitability of the financial evaluation results according to an embodiment of the present invention.

FIG. 5 is a display interface diagram illustrating a profit-quality portion of a financial evaluation result according to an embodiment of the present invention.

FIG. 6 is a diagram of a display interface of the financial evaluation results growth capability component according to an embodiment of the invention.

FIG. 7 is a diagram of a display interface of the financial evaluation result business efficiency portion according to an embodiment of the present invention.

FIG. 8 is a block diagram of a financial evaluation apparatus for a listed company according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the invention.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Different businesses may have distinct business strategies, such as: guizhou Maotai is focused on the major business, cash and profit are selected for further research and development and production, so that the scale, the brand and the market share are continuously enlarged, and finally the Guizhou Maotai becomes a large-market-value enterprise with world influence on furniture; the Qin' an stock shares main engine core parts, but the cash and profit of the main engine core parts are selected to carry out the raw material hedging business and the futures investment on the premise of not influencing the normal operation and the operation legal compliance, thereby forming an A stock myth which can make a profit of 7 million yuan in 5 months and make a contribution profit ratio of more than 99%. If the business strategies of different enterprises are not distinguished and the same financial model is used for evaluating the enterprises, the results are often biased in a certain direction.

In view of the above problems in the prior art, the invention provides a set of brand-new financial evaluation solution for listed companies, which comprises the steps of firstly, quantitatively summarizing strategic target labels of an enterprise, such as an asset strategy, a financing structure and the like, from an asset/debt table of the listed companies according to the occupation ratio of assets or debts of different categories, and then, respectively analyzing and summarizing the effectiveness of financial indexes of three reports on evaluating the enterprise capacity for operation, growth and the like under different label categories.

More microscopically, the latter half of the process mainly describes the market effects of 'after the fact' and 'passive' generated by enterprise operation, which is similar to the current mainstream model; the first half of the process, however, additionally characterizes the enterprise operator's "prior" and "proactive" asset planning and financing schemes, and only by considering them, is it possible to internally evaluate whether the strategic objectives of the enterprise are justified and ultimately whether the corresponding value creation is achieved as expected, rather than merely from the perspective of an external investor regarding potential investment benefits.

The following describes in detail a specific embodiment of the financial evaluation method of marketable companies according to the present invention with reference to the accompanying drawings.

As shown in FIG. 1, the financial evaluation method of the listed company of the present invention comprises the following steps:

s10: and acquiring an asset liability statement of the listed company.

As is well known, the Balance Sheet (also called the financial statement Sheet) represents the main accounting statement of the enterprise's financial statements (i.e., the statements of the assets, liabilities, and owner's rights) at a certain date (usually at the end of each accounting period). In more detail, this step acquires data of the installment statement of each listed company, thereby being used for evaluating installment financial condition of each listed company.

S20: classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of the listed companies based on data of liabilities in the balance sheet and owner equity title.

In one embodiment, the step of classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement specifically comprises the following steps:

firstly, carrying out classified statistics on data of the asset subjects in the balance sheet of the listed company according to the operational categories and the investment categories;

specifically, "business category" asset subjects include: accounts receivable, prepaid accounts, inventory, fixed assets, on-the-fly projects, etc., the "investments category" asset subject includes: financial assets, bond to maturity, long term equity investments, other liquidity assets, and the like. And respectively accumulating the asset subjects contained in the managerial category and the investment category so as to carry out the classified statistics of the managerial category and the investment category.

Secondly, classifying the asset strategy of the listed company according to the proportion of each type of statistical result in the total assets; wherein the strategic categorization of assets comprises: dominant class of management assets, dominant class of investment assets, and heavy classification of management and investment.

For example, referring to FIG. 2, the capital asset subject in Guizhou Imperial at the first quarter of 2021 is 69% of total assets, and the capital asset subject is 9.0% of total assets (the remaining 22% being other assets), with the former being significantly higher than the latter, so that the current stage of Guizhou Imperial's asset strategy is classified as "capital dominant".

In one embodiment, the step of classifying the financing structure of the listed company based on the liabilities in the balance sheet and the data of the owner equity subjects comprises the following steps:

firstly, carrying out classified statistics on the liabilities in the balance sheet of the listed company and the data of the equity subjects of the owner according to the operational liabilities, the financial liabilities, the stockholder income and the accumulated profits;

specifically, the "operational liability" subject includes payable, accounts payable, pre-accounts, etc., the "financial liability" subject includes short-term loans, non-liquidity liabilities due within one year, transactional financial liabilities, bond payable, long-term loans, etc., the "stockholder income" subject includes real income capital, capitalization, etc., and the "cumulative profit" subject includes earnings, unallocated profits, etc. The categories of the operational liability, the financial liability, the stockholder income and the accumulated profit are respectively accumulated, so that the classified statistics of the operational liability, the financial liability, the stockholder income and the accumulated profit are performed.

Secondly, classifying the financing structure of the listed company according to the proportion of each type of statistical result in total liability (namely liability and owner equity total); wherein the categorizing of the financing structure comprises: an operations driver, a debt financing driver, a stockholder financing driver, and a profit driver.

For example, referring to fig. 3, the proportion of the total of the business liability items in the first quarter of 2021 of the Qin 'an shares to the total liability is 15%, the proportion of the total of the financial liability items to the total liability is 13%, the proportion of the total of the stockholder income liability items to the total liability is 2%, the proportion of the total of the cumulative profit items to the total liability is 10% (the remaining 60% are other liabilities), and thus the financing structure of the current season of the Qin' an shares is classified as "business driving class".

S30: and inputting the asset strategy category and/or the financing structure category which the listed company belongs to into a pre-trained financial evaluation model, so that the financial evaluation model outputs the financial evaluation result of the listed company.

In one embodiment, the financial evaluation model employs a multi-factor model. And pre-training a multi-factor model of financial evaluation based on the asset strategy label and the financing structure label of the enterprise.

The multi-factor model is a widely applied financial evaluation model in the field at present, and the logic and the framework of the multi-factor model are very mature. In short, "one-factor model" refers to defining a standardized index (e.g. ROE), calculating the index value that all listed companies can obtain at the same time, and sorting and scoring by groups according to a specified label (e.g. in the industry) (the higher the ranking in a group is, the higher the score is, or the lower the ranking in a group is, the higher the score is, one of the two is selected), and then deciding a model for buying and selling stocks according to the score (the stock A is not empty, so x companies with the highest score are usually bought regularly by default). The "multi-factor model" is a model in which scores of a plurality of the above single-factor models are weighted and averaged to calculate a total score, and stock buying and selling is determined according to the total score (usually, x companies with the highest regular buying score are defaulted). The 'training' of the multi-factor model refers to the process of scoring massive index definitions and single-factor models corresponding to the index definitions and testing the correlation between scoring results and the amplitude of rise and fall of the stocks of the company in a future period. A group of indexes with high correlation is selected from the indexes and the weights are tested, so that the correlation between the total score of each company and the amplitude of rise and fall of the stocks in a future period is high by using the multi-factor model constructed by the indexes, and the amplitude of rise and fall of the finally selected x stocks in the future period is as high as possible. For the multi-factor model, the main difference between different models is the division of dimensions and the setting of details such as weight coefficients. In addition to two important label factors of 'enterprise size' and 'affiliated industry' which are commonly used, the label of 'asset strategy' and 'financing structure' are taken into consideration and processed by the same algorithm, so that new weight is obtained. Preferably, the financial indexes are divided into four dimensions of 'profitability', 'profitability quality', 'growth ability' and 'operation efficiency'. In this way, the financial evaluation model can output financial evaluation results of the four dimensions of profitability, profitability quality, growth ability and operational efficiency of the listed company according to the enterprise scale, the industry, the asset strategy category and the financing structure category of the listed company, as shown in fig. 4 to 7, so as to provide operational guidance for the operator and the investor of the enterprise at the same time.

For example, based on the size, industry, asset strategy and financing structure of Guizhou thatch, the profit capacity score of 9.9, the profit quality score of 5.7, the growth capacity score of 3.6, the business efficiency score of 6.0, the weighted total score of 6.3 (10 in total) are ranked 5 in companies listed in the same industry and 26 in companies listed in the same asset strategy and financing structure in 2021.

In connection with the above, it should be noted that, in the process of the "multi-factor model" training, the grouping scores of the mass indicators are enumerated first, and then the relevance between the grouping scores and the future stock prices is tested. We have introduced new groupings here, namely "asset strategies" and "financing structures", equivalent to the introduction of innovative scoring approaches. This scoring approach applies to all previous alternatives, with two consequences: the first is that the new scoring is not as related to the price of the stock as the previous method, then this "innovation" is of no practical value, which is why this kind of innovation cannot be freely compiled; the second result is that the new score correlates better with the price of the stock than the previous method (e.g., scoring by industry group), which can actually improve the effectiveness of the entire multi-factor model (e.g., the selected stock will rise and fall more in the future), and this innovation is of practical value and unique and irreplaceable by other methods. A large number of simulation experiments prove that under the condition that other conditions are not changed, the effectiveness of the new models of the asset strategy and the financing structure on the evaluation of listed companies is improved by 3 percent (from 78 percent to 81 percent) compared with the existing model without the two labels (the increase and decrease of the stock price is judged on the basis of 90 days after the enterprise financial newspaper is released), which is enough to prove the superiority of the method in comparison with the existing method.

Preferably, the above steps S10-S30 are deployed in the server in the form of software program, and are executed once a day at regular time, and based on all newly disclosed financial statements of listed companies in the current day, asset strategy, financing structure and corresponding financial evaluation corresponding to the current term of the enterprise are calculated, and are referred to by managers and investors of the enterprise.

All or part of the steps for implementing the above method embodiments may be performed by hardware associated with a computer program. Based upon such an understanding, the present invention also provides a computer program product comprising one or more computer instructions. The computer instructions may be stored in a computer readable storage medium. The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Referring to fig. 8, the embodiment provides a financial evaluation device for a listed company, and since the technical principle of the embodiment is similar to that of the foregoing method embodiment, repeated descriptions of the same technical details are not repeated. The financial evaluation device of the listed company of the embodiment comprises the following modules:

An obtaining module, configured to perform step S10 in the foregoing method embodiment;

a classification module for performing step S20 in the foregoing method embodiment;

an evaluation module for performing step S30 in the aforementioned method embodiment.

It should be understood by those skilled in the art that the division of the modules in the present embodiment is only a division of logical functions, and the actual implementation may be fully or partially integrated into one or more physical entities. And the modules can be realized in a form that all the modules are called by the processing element through software, can also be realized in a form that all the modules are called by the hardware, can also be realized in a form that part of the modules are called by the processing element through software, and can also be realized in a form that part of the modules are called by the hardware.

Referring to fig. 9, the embodiment provides an electronic device, which may be a desktop computer, a portable computer, a smart phone, or the like. In detail, the electronic device comprises at least, connected by a bus: the system comprises a memory and a processor, wherein the memory is used for storing computer programs, and the processor is used for executing the computer programs stored by the memory so as to execute all or part of the steps in the method embodiment.

The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The Memory may include a Random Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.

The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.

In summary, the financial evaluation method, the evaluation device, the storage medium and the electronic device of the listed company quantitatively link the internal and active strategic targets of the listed company with the external and passive investment values thereof for the first time, thereby more comprehensively evaluating how much the listed company realizes the profit, growth and value creation planned by the management layer, rather than only paying attention to the potential investment profit and loss from the perspective of external investors, effectively overcoming various defects in the prior art and having high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A method for marketing company financial evaluations, comprising:

acquiring an asset liability statement of a listed company;

classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of said listed companies based on data of liabilities and owner equity topics in said balance sheet;

and inputting the asset strategic category and/or the financing structure category attributed to the listed company into a pre-trained financial evaluation model, so that the financial evaluation model outputs the financial evaluation result of the listed company.

2. The method of claim 1, wherein the financial evaluation model comprises: a multi-factor model; the inputs to the financial evaluation model further include: the enterprise size and the industry of the listed company; and the financial evaluation model outputs financial index data of the listed company according to the enterprise scale, the affiliated industry, the asset strategy category and the financing structure category of the listed company.

3. The method of claim 2, wherein the financial metric data comprises: profitability, growth capacity, and/or operational efficiency.

4. The method of claim 1, wherein said categorizing the equity strategy of said listed company based on data for equity subjects in said balance sheet comprises:

carrying out classified statistics on the data of the asset subjects in the balance sheet of the listed company according to the management category and the investment category;

and classifying the asset strategy of the listed company according to the proportion of each type of statistical result in the total assets.

5. The method of claim 4, wherein the categorizing of the asset strategy comprises: dominant class of management assets, dominant class of investment assets, and heavy classification of management and investment.

6. The method of claim 1, wherein said categorizing financing structures of said listed companies based on data of liabilities in said balance sheet and owner equity title comprises:

carrying out classified statistics on the liabilities in the balance sheet of the listed company and the data of the equity subjects of the owners according to the operational liabilities, the financial liabilities, the stockholder income and the accumulated profits;

and classifying the financing structure of the listed company according to the proportion of each type of statistical result in the total liability.

7. The method of claim 6, wherein the categorizing of the financing structure comprises: a business driver class, a debt financing driver class, a stockholder financing driver class, and a profit driver class.

8. A marketing company financial evaluation apparatus, comprising:

the acquisition module is used for acquiring an asset liability statement of a listed company;

the classification module is used for classifying the asset strategy of the listed company based on the data of the asset subjects in the asset liability statement; and/or categorizing financing structures of the listed companies based on data of liabilities in the balance sheet and owner equity title;

and the evaluation module is used for inputting the asset strategy category and/or the financing structure category which the listed company belongs to into a pre-trained financial evaluation model so that the financial evaluation model can output the financial evaluation result of the listed company.

9. A computer-readable storage medium, in which a computer program is stored which, when loaded and executed by a processor, carries out the method according to any one of claims 1 to 7.

10. An electronic device, comprising: a processor and a memory; wherein the content of the first and second substances,

The memory is used for storing a computer program;

the processor is configured to load and execute the computer program to cause the electronic device to perform the method according to any one of claims 1 to 7.