CN103539508B - Macroelement water-soluble fertilizer and preparation method thereof - Google Patents
Macroelement water-soluble fertilizer and preparation method thereof Download PDFInfo
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- CN103539508B CN103539508B CN201310557162.0A CN201310557162A CN103539508B CN 103539508 B CN103539508 B CN 103539508B CN 201310557162 A CN201310557162 A CN 201310557162A CN 103539508 B CN103539508 B CN 103539508B
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Abstract
The invention discloses macroelement water-soluble fertilizer and a preparation method thereof. The macroelement water-soluble fertilizer comprises the following components in parts by weight: 30 to 70 parts of urea, 10 to 30 parts of monoammonium phosphate, 20 to 57.5 parts of a potassium source, 0.5 to 1.5 parts of zinc sulfate, 0.05 to 0.25 part of phosphoric acid, 0.5 to 1.5 parts of boric acid, 0.25 to 1 part of humic acid and 0.5 to 2 parts of water. According to the technical scheme, cheap potassium chloride and potassium sulfate serve as the sources of potassium, so the cost of the product is effectively reduced; potassium chloride and potassium sulfate are subjected to complexing by a phosphoric acid solution, humic acid and boric acid, so that dissolving of potassium chloride and potassium sulfate into water is accelerated. Therefore, a high practical application value is achieved.
Description
Technical field
The present invention relates to water-soluble fertilizer, in particular, a kind of macroelement water-soluble fertilizer and preparation method thereof.
Background technology
Along with the development of technology, China's agricultural is in Derived from Agricultural Modernization, for accelerating to realize agricultural modernization; country is wideling popularize large-scale planting and water-fertilizer integral at present; dropping into substantial contribution guides agricultural to install drip irrigation facility, and especially northern drought area, facility development quickly.The fast development of drip irrigation facility, objectively require that Water soluble fertilizer is inexpensive, peasant household will afford to use, but the domestic Water soluble fertilizer also not having supporting country to promote water-fertilizer integral at present occurs.
The raw material sources of production macroelement Water soluble fertilizer potassium current are at present mainly potassium primary phosphate and saltpetre, and other raw materials are urea, monoammonium phosphate, ammonium nitrate, chelated microelements, and various raw material is blended into and carries out together stirring.
But source potassium primary phosphate and the saltpetre of existing production technology potassium are expensive, cause Water soluble fertilizer to hold at high price.Import Water soluble fertilizer price is generally at about 30,000 yuan per ton, domestic also at about 20,000 yuan per ton.Water soluble fertilizer, due to expensive, only uses at present on the cash crop that economic worth is higher, or for foliage fertilizer.Current macroelement Water soluble fertilizer production method causes solid Water soluble fertilizer expensive, cannot carry out large-scale promotion, can not adapt to the needs that country promotes water-fertilizer integral.And Common compound fertilizer, the non-constant of solubleness, and not containing trace element, then can not adapt to the needs of drip irrigation facility completely.
Common compound fertilizer potash fertilizer source then uses Repone K and potassium sulfate, the non-constant of solubleness, and not containing trace element.
Therefore, prior art existing defects, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new macroelement water-soluble fertilizer and preparation method thereof.
Technical scheme of the present invention is as follows: a kind of macroelement water-soluble fertilizer, and it comprises the component of following mass ratio: 30 ~ 70 parts, urea, monoammonium phosphate 10 ~ 30 parts, 20 ~ 57.5 parts, potassium source, 0.5 ~ 1.5 part, zinc sulfate, phosphoric acid 0.05 ~ 0.25 part, boric acid 0.5 ~ 1.5 part, humic acid 0.25 ~ 1 part, 0.5 ~ 2 part, water.
Preferably, in described macroelement water-soluble fertilizer, described potassium source comprises 20 ~ 55 parts, Repone K and/or potassium sulfate 27.5 ~ 57.5 parts.
Preferably, described macroelement water-soluble fertilizer also comprises calcium ammonium nitrate 0.75 ~ 2.5 part, 0.75 ~ 2.5 part, magnesium sulfate, manganous sulfate 0.25 ~ 1.5 part and/or 0.25 ~ 1.5 part, copper sulfate.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass ratio: 50 ~ 60 parts, urea, monoammonium phosphate 10 ~ 15 parts, 30 ~ 50 parts, Repone K, potassium sulfate 30 ~ 50 parts, 1 ~ 1.5 part, magnesium sulfate, calcium ammonium nitrate 1 ~ 1.5 part, 0.5 ~ 1 part, zinc sulfate, manganous sulfate 0.25 ~ 0.5 part, phosphoric acid 0.05 ~ 0.1 part, boric acid 0.5 ~ 1 part, humic acid 0.5 ~ 0.8 part, 1 ~ 1.5 part, water.
Preferably, in described macroelement water-soluble fertilizer, in described humic acid, the total content of calcium, magnesium, potassium, sodium is 3 ~ 24%.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass ratio: urea 60%, monoammonium phosphate 10%, potassium sulfate 26%, magnesium sulfate 1%, zinc sulfate 0.5%, manganous sulfate 0.25%, phosphoric acid 0.05%, boric acid 0.5%, humic acid 0.5%, water 1%.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass percent: 60 parts, urea, monoammonium phosphate 10 parts, potassium sulfate 26 parts, 1 part, magnesium sulfate, 0.5 part, zinc sulfate, manganous sulfate 0.25 part, phosphoric acid 005 part, boric acid 0.5 part, humic acid 0.5 part, 2 parts, water.
The another technical scheme of the present invention is as follows: a kind of preparation method of macroelement water-soluble fertilizer, and it comprises the following steps: S1, adopts arbitrary above-mentioned macroelement water-soluble fertilizer, is dropped into by the raw material outside phosphoric acid, humic acid, boric acid, water in stirrer; S2, phosphoric acid thin up is added in stirrer; S3, adds humic acid and boric acid, stirs and pre-sets the time.
Preferably, in described preparation method, in step S1, described raw material release sequence is: part urea, part sylvite, part monoammonium phosphate, magnesium sulfate, zinc sulfate, manganous sulfate and/or copper sulfate, humic acid, residue urea, the phosphoric acid solution of dilution, residue sylvite, residue monoammonium phosphate.
Preferably, in described preparation method, adjust the concentration of described phosphoric acid solution according to atmospheric moisture.
Adopt such scheme, the present invention adopts low-cost Repone K and/or potassium sulfate as the source of potassium, effectively reduce the cost of product, and adopt phosphoric acid solution, humic acid and boric acid, network is carried out to Repone K and potassium sulfate, accelerate Repone K and the dissolving of potassium sulfate in water, thus there is very high actual application value.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an embodiment of preparation method of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Gordian technique point of the present invention is exactly add phosphoric acid solution concentration according to atmospheric moisture adjustment, add appropriate humic acid (also claiming humic acids) and boric acid, network is carried out to Repone K and potassium sulfate, accelerate Repone K and the dissolving of potassium sulfate in water, make to become a reality with the Water soluble fertilizer in Repone K and the potassium sulfate source that is potassium.
And, the present invention utilizes cheap Repone K and potassium sulfate, replace expensive potassium primary phosphate and saltpetre, by adding specific complexing agent, make Repone K and potassium sulfate accelerate dissolution, product reaches completely water-soluble effect, and dissolution rate is fast, meet drip irrigation facility to the deliquescent requirement of fertilizer, significantly reduce drip irrigation facility fertilizers input cost.
One embodiment of the present of invention are, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 30 ~ 70 parts, urea, monoammonium phosphate 10 ~ 30 parts, 20 ~ 57.5 parts, potassium source, 0.5 ~ 1.5 part, zinc sulfate, phosphoric acid 0.05 ~ 0.25 part, boric acid 0.5 ~ 1.5 part, humic acid 0.25 ~ 1 part, 0.5 ~ 2 part, water.Preferably, described potassium source is Repone K and/or potassium sulfate, and such as, described potassium source comprises 20 ~ 55 parts, Repone K and/or potassium sulfate 27.5 ~ 57.5 parts.Preferably, macroelement water-soluble fertilizer also comprises calcium ammonium nitrate 0.75 ~ 2.5 part, 0.75 ~ 2.5 part, magnesium sulfate, manganous sulfate 0.25 ~ 1.5 part and/or 0.25 ~ 1.5 part, copper sulfate.Such as, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 35 parts, urea, monoammonium phosphate 25 parts, potassium sulfate 30 parts, 1.5 parts, magnesium sulfate, 1 part, zinc sulfate, manganous sulfate 0.5 part, phosphoric acid 0.1 part, boric acid 0.8 part, humic acid 0.6 part, 1.5 parts, water.And for example, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 65 parts, urea, monoammonium phosphate 12 parts, potassium sulfate 50 parts, 2 parts, magnesium sulfate, 0.5 part, zinc sulfate, manganous sulfate 0.75 part, phosphoric acid 0.2 part, boric acid 1.2 parts, humic acid 1 part, 2 parts, water.Such as, humic acid is black humic acid or yellow humic acid, and preferably, humic acid is yellow humic acid.And for example, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 48 parts, urea, monoammonium phosphate 19 parts, 50 parts, Repone K, 2 parts, magnesium sulfate, 0.62 part, zinc sulfate, manganous sulfate 0.73 part, 0.4 part, copper sulfate, phosphoric acid 0.2 part, boric acid 1.2 parts, humic acid 1 part, 2 parts, water.
Another example is, a kind of macroelement water-soluble fertilizer, includes following component by mass percentage:
For reducing Water soluble fertilizer price, the present invention uses low-cost Repone K and potassium sulfate as the source of potassium.Because the solubleness of Repone K and potassium sulfate itself is lower, use Repone K and potassium sulfate as the source of potassium, first will solve Repone K and potassium sulfate dissolution rate problem.Adding specific complexing auxiliary agent by working out, promoting the dissolving of Repone K and potassium sulfate, thus Repone K and potassium sulfate are become a reality as the source of Water soluble fertilizer potassium, greatly reduce the cost of Water soluble fertilizer.
Be main complexing agent owing to have employed phosphoric acid in composition of the present invention, humic acid, boric acid are secondary complexing method, the water-soluble of Repone K and potassium sulfate can be accelerated, humic acid is used surprisingly to find that it has the effect of anti-caking, Repone K and potassium sulfate are become a reality as the source of Water soluble fertilizer potassium, and the manufacturing technology of Water soluble fertilizer is upgraded.
Preferably, described macroelement water-soluble fertilizer also comprises 20 ~ 55 parts, Repone K.Such as, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 58 parts, urea, monoammonium phosphate 16 parts, 21 parts, Repone K, potassium sulfate 38 parts, 2.4 parts, magnesium sulfate, 0.85 part, zinc sulfate, manganous sulfate 0.88 part, phosphoric acid 0.06 part, boric acid 0.98 part, humic acid 0.85 part, 1.6 parts, water.
Preferably, described macroelement water-soluble fertilizer also comprises calcium ammonium nitrate 0.75 ~ 2.5 part.Such as, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 62 parts, urea, monoammonium phosphate 11 parts, 52 parts, Repone K, potassium sulfate 44 parts, 0.8 part, magnesium sulfate, calcium ammonium nitrate 1.8 parts, 1.35 parts, zinc sulfate, manganous sulfate 0.32 part, phosphoric acid 0.19 part, boric acid 1.26 parts, humic acid 0.36 part, 0.8 part, water.And for example, a kind of macroelement water-soluble fertilizer, it comprises the component of following mass ratio: 59 parts, urea, monoammonium phosphate 13 parts, 52 parts, Repone K, potassium sulfate 44 parts, 0.8 part, magnesium sulfate, calcium ammonium nitrate 1.9 parts, 1.36 parts, zinc sulfate, 0.38 part, copper sulfate, phosphoric acid 0.19 part, boric acid 1.26 parts, humic acid 0.36 part, 0.9 part, water.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass ratio: 50 ~ 60 parts, urea, monoammonium phosphate 10 ~ 15 parts, 30 ~ 50 parts, Repone K, potassium sulfate 30 ~ 50 parts, 1 ~ 1.5 part, magnesium sulfate, calcium ammonium nitrate 1 ~ 1.5 part, 0.5 ~ 1 part, zinc sulfate, manganous sulfate 0.25 ~ 0.5 part, phosphoric acid 0.05 ~ 0.1 part, boric acid 0.5 ~ 1 part, humic acid 0.5 ~ 0.8 part, 1 ~ 1.5 part, water.Such as, described macroelement water-soluble fertilizer comprises the component of following mass ratio: 60 parts, urea, monoammonium phosphate 10 parts, 30 parts, Repone K, potassium sulfate 30 parts, 1 part, magnesium sulfate, calcium ammonium nitrate 1 part, 0.5 part, zinc sulfate, manganous sulfate 0.25 part, phosphoric acid 005 part, boric acid 0.5 part, humic acid 0.5 part, 1 part, water.And for example, described macroelement water-soluble fertilizer comprises the component of following mass ratio: 50 parts, urea, monoammonium phosphate 15 parts, 40 parts, Repone K, potassium sulfate 40 parts, 1.2 parts, magnesium sulfate, calcium ammonium nitrate 1.3 parts, 0.8 part, zinc sulfate, manganous sulfate 0.5 part, phosphoric acid 0.08 part, boric acid 0.75 part, humic acid 0.8 part, 1.2 parts, water.
Preferably, in described macroelement water-soluble fertilizer, in described humic acid, the total content of calcium, magnesium, potassium, sodium is 3 ~ 24%.Described content is mass percent.Such as, in described humic acid, the total content of calcium, magnesium, potassium, sodium is 3%, 5%, 6%, 8%, 12%, 15%, 18%, 22% or 24%.Such as, in described humic acid, the content of calcium, magnesium, potassium, sodium is respectively 1%, 2%, 5%, 2%.And for example, in described humic acid, the content of calcium, magnesium, potassium, sodium is respectively 0.3%, 0.6%, 1.5%, 0.7%.And for example, in described humic acid, the content ratio of calcium, magnesium, potassium, sodium is 1:1:2:1.And for example, in described humic acid, the content ratio of calcium, magnesium, potassium is 1:2:5.
And for example, preferably, described humic acid is natural humus acid; Preferably, described humic acid is coal coal humic acid; Preferably, described coal coal humic acid is in conjunction with humic acid.Preferably, described humic acid is coal coal humic acid and water body humic acid; Both mass percents are 80%:20%.Wherein, the content ratio of calcium, magnesium, potassium, sodium is 1:1:2:1.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass ratio: urea 60%, monoammonium phosphate 10%, potassium sulfate 26%, magnesium sulfate 1%, zinc sulfate 0.5%, manganous sulfate 0.25%, phosphoric acid 0.05%, boric acid 0.5%, humic acid 0.5%, water 1%.
Preferably, described macroelement water-soluble fertilizer comprises the component of following mass percent: 60 parts, urea, monoammonium phosphate 10 parts, potassium sulfate 26 parts, 1 part, magnesium sulfate, 0.5 part, zinc sulfate, manganous sulfate 0.25 part, phosphoric acid 0.05 part, boric acid 0.5 part, humic acid 0.5 part, 2 parts, water.
As shown in Figure 1, further embodiment of this invention is as follows: a kind of preparation method of macroelement water-soluble fertilizer, it comprises the following steps: S1, adopts macroelement water-soluble fertilizer described in arbitrary above-described embodiment, is dropped into by the raw material outside phosphoric acid, humic acid, boric acid, water in stirrer; S2, phosphoric acid thin up is added in stirrer; S3, adds humic acid and boric acid, stirs and pre-sets the time.Preferably, in described preparation method, in step S1, described raw material release sequence is: part urea, part sylvite, part monoammonium phosphate, magnesium sulfate, zinc sulfate, manganous sulfate and/or copper sulfate, humic acid, residue urea, the phosphoric acid solution of dilution, residue sylvite, residue monoammonium phosphate.Preferably, front and back throw in the ratio of urea for twice is that 40% to 60%:60% is to 40%; And for example, front and back throw in the ratio of sylvite for twice is that 30% to 70%:70% is to 30%; And for example, front and back throw in the ratio of monoammonium phosphate for twice is that 45% to 55%:55% is to 45%; Such as, in step S1, described raw material release sequence is: S11, drop into 40% urea, S12, drop into 45% sylvite, such as, potassium sulfate, S13, drop into 50% monoammonium phosphate, S14, drop into magnesium sulfate, zinc sulfate, manganous sulfate and/or copper sulfate, S15, drop into humic acid, S16, drop into 60% urea, the phosphoric acid solution of S17, input dilution, that is, phosphoric acid is water-soluble, S18, drop into 55% sylvite, S19, drop into 50% monoammonium phosphate.
Preferably, in described preparation method, adjust the concentration of described phosphoric acid solution according to atmospheric moisture.Such as, during dry air, slightly add little water, when there was dampness in the air, appropriateness adds a little water less.Only need to make phosphoric acid water-soluble.Such as, atmospheric moisture is high, then the concentration of described phosphoric acid solution is high; Atmospheric moisture is low, then the concentration of described phosphoric acid solution is low.Such as, the concentration of phosphoric acid solution and atmospheric moisture are inversely proportional to; Such as, atmospheric moisture is 90%, then the concentration of described phosphoric acid solution is 10%; Atmospheric moisture is 50%, then the concentration of described phosphoric acid solution is 7.5%; Atmospheric moisture is 10%, then the concentration of described phosphoric acid solution is 5%; By that analogy.
Such as, a kind of preparation method of macroelement water-soluble fertilizer, first determines the usage quantity of raw material, comprises urea, starting material potassium, monoammonium phosphate, trace element, humic acid, phosphoric acid etc., then transport to dog-house, ready work according to formula; Then granular urea is pulverized; Appropriate phosphoric acid is put into bucket or other containers, adds a certain amount of clear water, dilute, ratio is 1:18.And for example, Dilution ratio is 1:10; And for example, Dilution ratio is 1:8; And for example, Dilution ratio is 1:5.
Such as, feeding sequence is: first throwing one to two bag of urea → → throw one bag of potassium → → monoammonium phosphate → → trace element → → humic acid → → urea → → phosphoric acid → → potassium → → monoammonium phosphate again.Then stir, churning time is 20 minutes, carries out the abundant mixing between starting material, network.Then finished product delivers from godown, and packs.
And for example, according to the formulation selection raw material that company determines, comprise urea, monoammonium phosphate, Repone K, potassium sulfate, trace element and drop in proportion in stirrer.Add phosphoric acid diluting soln, the concentration of phosphoric acid solution will adjust according to atmospheric moisture, adds humic acid and boric acid, thus plays complexing action, produces needs-satisfying products.
Such as, below according to practical situations, provide a kind of water-soluble fertilizer embodiment, it includes following component by mass percentage:
The implementation case is potassium sulfate type height nitrogen formula, and be applicable to all kinds of crop spring tip, the strong leaf phase uses, timely and effective supply crop tillers, the nutrition of phase needs that come into leaves, and photosynthesis enhancing, blade face is dark green, and plant is strong, lays in sufficient nutrition.
The present invention sums up out in practice, and determines multiple specific product formula and distribution thereof, and can adjust formula according to the needs of client.
The superpower solubization of Water soluble fertilizer tool that the present invention produces, product almost reaches 100% water-soluble, and water-insoluble is less than 0.1%, and field temperature just can rapid solution, can meet fast, the pure requirement of the dissolving of drip irrigation facility to Water soluble fertilizer.
Further, embodiments of the invention also comprise, each technical characteristic of the various embodiments described above, macroelement water-soluble fertilizer be mutually combined to form and preparation method thereof.The invention solves with the water-soluble problem of the Water soluble fertilizer in Repone K and the potassium sulfate source that is potassium, raw material drawing cost is low, and Water soluble fertilizer product cost reduces by more than 30%, thus reduces cost, and retail price declines to a great extent, and makes peasant household to afford to use Water soluble fertilizer.Such water-fertilizer integral could realize, and by facility fertilising, application with irrigation water, saves fertilizer 60%, saves labor force 70%, economizes on water 80%, reach the object of low-carbon environment-friendly, energy-saving and emission-reduction, and allow soil become healthy, environment is purified.
It should be noted that, above-mentioned each technical characteristic continues combination mutually, is formed not in above-named various embodiment, is all considered as the scope that specification sheets of the present invention is recorded; Further, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (2)
1. a macroelement water-soluble fertilizer, it is characterized in that, comprise the component of following quality: 30 ~ 70 parts, urea, monoammonium phosphate 10 ~ 30 parts, 20 ~ 57.5 parts, potassium source, 0.5 ~ 1.5 part, zinc sulfate, phosphoric acid 0.05 ~ 0.25 part, boric acid 0.5 ~ 1.5 part, humic acid 0.25 ~ 1 part and 0.5 ~ 2 part, water;
In described humic acid, the content ratio of calcium, magnesium, potassium, sodium is 1:1:2:1;
Described potassium source comprises 20 ~ 55 parts, Repone K and/or potassium sulfate 27.5 ~ 57.5 parts;
Also comprise calcium ammonium nitrate 0.75 ~ 2.5 part, 0.75 ~ 2.5 part, magnesium sulfate, manganous sulfate 0.25 ~ 1.5 part and/or 0.25 ~ 1.5 part, copper sulfate.
2. macroelement water-soluble fertilizer according to claim 1, it is characterized in that, in described humic acid, the total content of calcium, magnesium, potassium, sodium is 3 ~ 24%.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106187392A (en) * | 2016-07-29 | 2016-12-07 | 贵州芭田生态工程有限公司 | Boron-rich high calcium compound fertilizer and preparation method thereof |
| CN106748256A (en) * | 2017-01-17 | 2017-05-31 | 河南漯效王生物科技股份有限公司 | A kind of a great number of elements water-soluble fertilizer containing humic acid and preparation method thereof |
| CN107827660A (en) * | 2017-11-28 | 2018-03-23 | 贵阳开磷化肥有限公司 | A kind of humic acid water-soluble slow-releasing potash fertilizer and preparation method thereof |
| CN108191578A (en) * | 2018-03-07 | 2018-06-22 | 青海国泰盐湖资源股份有限公司 | One kind contains humic acid water-soluble fertilizer |
| CN108191500A (en) * | 2018-03-07 | 2018-06-22 | 青海国泰盐湖资源股份有限公司 | A kind of a great number of elements water-soluble fertilizer |
| CN108640763A (en) * | 2018-07-19 | 2018-10-12 | 华中农业大学 | Multi-functional clear liquid type liquid fertilizer of high potassium containing amino acid and preparation method thereof |
| CN109232098A (en) * | 2018-11-09 | 2019-01-18 | 中国农业科学院农业资源与农业区划研究所 | Organic nutrition type potassium sulfate solutiser and its purposes of preparation and it |
| CN109438136A (en) * | 2018-12-29 | 2019-03-08 | 成都云图控股股份有限公司 | A kind of calcium ammonium nitrate compound fertilizer and preparation method thereof containing nitro humus acid |
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| CN101318858A (en) * | 2007-10-24 | 2008-12-10 | 石河子大学 | Clear liquid complex fertilizer special for high concentration drip irrigation and method of preparing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101318858A (en) * | 2007-10-24 | 2008-12-10 | 石河子大学 | Clear liquid complex fertilizer special for high concentration drip irrigation and method of preparing the same |
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Effective date of registration: 20160218 Address after: 518052 Nanshan Science and Technology Service Center, 1 Qilin Road, Shenzhen, Guangdong, 810, Nanshan District Patentee after: Shenzhen agricultural science and Technology Park irrigation Co. Ltd. Address before: 518052 Nanshan District science and technology innovation service center, 1 Qilin Road, Shenzhen, Guangdong 810-811, Nanshan District Patentee before: Shenzhen's gold one hundred promise investment company limited by guarantee |