CN206332672U - A kind of fiber optic protection monitoring device and its application circuit - Google Patents
A kind of fiber optic protection monitoring device and its application circuit Download PDFInfo
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- CN206332672U CN206332672U CN201720023588.1U CN201720023588U CN206332672U CN 206332672 U CN206332672 U CN 206332672U CN 201720023588 U CN201720023588 U CN 201720023588U CN 206332672 U CN206332672 U CN 206332672U
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- 239000000835 fiber Substances 0.000 title claims abstract description 52
- 238000012806 monitoring device Methods 0.000 title claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 58
- 238000000253 optical time-domain reflectometry Methods 0.000 claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 239000013307 optical fiber Substances 0.000 claims description 47
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000012360 testing method Methods 0.000 claims description 10
- 229940085805 fiberall Drugs 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model discloses a kind of fiber optic protection monitoring device and its application circuit, it is related to technical field of photo communication.The technical solution adopted in the utility model is such：Including controller, optical power monitoring circuit, shunt, combiner, wavelength-division multiplex circuit, OTDR equipment, wave filter, switching photoswitch, the photoswitch of one-level multiselect one and two grades of photoswitches of multiselect one；The single-ended a port with many terminals of the photoswitch of one-level multiselect one of the wherein two grades photoswitches of multiselect one is connected；Single-ended being connected with OTDR equipment of the photoswitch of one-level multiselect one；Many terminals of two grades of photoswitches of multiselect one are connected with two wavelength-division multiplex circuits respectively；Switching photoswitch is connected with two wavelength-division multiplex circuits, wave filters；Controller is stated to be connected with two photoswitches of multiselect one, OTDR equipment, optical power monitoring circuit and switching photoswitch.
Description
Technical field
The utility model is related to technical field of photo communication.
Background technology
" the communication operation industry statistical communique in 2015 " issued at the beginning of Ministry of Industry and Information 2016 claims, national newly-built optical cable in 2015
441.3 ten thousand kilometers of circuit, lightguide cable link total length reached between 2487.3 ten thousand kilometers, 2010 ~ 2015 years, lightguide cable link total length
Speedup is more than 20%.Corresponding is that the maintenance task of fiber cable network will be more heavy.
At present, traditional optical cable maintenance mode is still relied primarily on manually, substantially follows below scheme：Failure generation-
Notice safeguards that unit-driving to institute of failure office-uses OTDR（Optical Time Domain Reflectometer, optical time domain is anti-
Penetrate instrument）Test-the general people hole site of searching-is driven to the position of fault-repaired.Lasting long obstacle recovery time causes
Economic loss increase, traditional manual maintenance mode is far from the growth requirement for meeting business on optical cable transmission network.
Therefore, intelligentized optical survey equipment and system are researched and developed, new period communication, electric power, oil, railway friendship is met
The industries such as logical, military affairs and the application demand of department seem particularly urgent.
Utility model content
Goal of the invention of the present utility model is：For above-mentioned problem, there is provided a kind of fiber optic protection monitoring device.
The technical solution adopted in the utility model is such：Including controller, optical power monitoring circuit, shunt, conjunction
Road device, wavelength-division multiplex circuit, OTDR equipment, wave filter, switching photoswitch, the photoswitch of one-level multiselect one and two grades of light of multiselect one
Switch；
The single-ended a port with many terminals of the photoswitch of one-level multiselect one of the wherein two grades photoswitches of multiselect one is connected；One
Single-ended being connected with OTDR equipment of the level photoswitch of multiselect one；
The a port of many terminals of two grades of photoswitches of multiselect one is connected with the first wavelength-division multiplex circuit, the first wavelength-division multiplex
Circuit is used to be connected with one end of spare fibre, and another port and the second wavelength-division of many terminals of two grades of photoswitches of multiselect one are answered
Connected with circuit, the second wavelength-division multiplex circuit is used to be connected with one end of business optical fiber；
The first choice end of switching photoswitch is used to be connected with the other end of spare fibre, and the second selection end is used for and business
The other end connection of optical fiber, the input of the common port and wave filter that switch switch is connected, the output end of wave filter be used for it is remote
Hold transmission equipment connection；
Input of the first wavelength-division multiplex circuit also with the first shunt is connected, the first output end of the first shunt and the
One optical power monitoring circuit is connected, and the second output end of the first shunt and the first input end of combiner are connected；Second wavelength-division
Input of the multiplex circuit also with the second shunt is connected, the first output end of the second shunt and the second optical power monitoring circuit
Connection, the second output end of the second shunt and the second input of combiner are connected；
The output end of combiner is used to be connected with near-end transmission equipment；
The controller and the photoswitch of one-level multiselect one, two grades of photoswitches of multiselect one, for controlling both paths to select；
The controller is also connected with OTDR equipment, for controlling being turned on and off and for receiving of OTDR equipment
The testing result of OTDR equipment output；
The controller is also connected with optical power monitoring circuit, the result exported for received optical power observation circuit；
The controller is also connected with switching photoswitch, the strobe state for controlling switching photoswitch.
Further, also including telecommunication circuit；The controller is connected with the telecommunication circuit, for by the inspection of OTDR equipment
Survey result and be sent to telecommunication circuit, telecommunication circuit is used to send testing result.
Further, the optical power monitoring circuit is used to receive the optical signal that Optical Fiber Transmission comes, and detects that luminous power declines
Decrement, and attenuation is transferred to controller.
Further, the controller is used for when the attenuation is less than setting thresholding, two grades of photoswitches of multiselect one of gating,
The path of the corresponding optical fiber of the photoswitch of one-level multiselect one, and start OTDR equipment.
Further, the controller is additionally operable to by changing switch when detecting business fibercuts the gating of photoswitch
Business optical fiber is replaced with spare fibre by state.
Further, the port for many terminals that two grades of multiselects one are switched is respectively by a wavelength-division multiplex circuit and optical fiber all the way
Connection.
Further, the port for many terminals that one-level multiselect one is switched connects the single-ended of two grades of multiselect one switch respectively.
Further, the power of the first output end output optical signal of the shunt is believed more than its second output end output light
Number power.
Further, the power of the first output end output optical signal of the shunt exports optical signal with its second output end
Power ratio be 1:99.
The utility model additionally provides a kind of application circuit based on foregoing fiber optic protection monitoring device, also including standby
Optical fiber, business optical fiber, near-end transmission equipment and distal end transmission equipment；
Wherein, one end of spare fibre is connected with the first wavelength-division multiplex circuit of fiber optic protection monitoring device, spare fibre
The other end be connected with the first choice end of the switching photoswitch of fiber optic protection monitoring device；
One end of business optical fiber is connected with the second wavelength-division multiplex circuit of fiber optic protection monitoring device, business optical fiber it is another
Hold and be connected with the second selection end of the switching photoswitch of fiber optic protection monitoring device；
Near-end transmission equipment is connected with the output end of the combiner of fiber optic protection monitoring device；
Distal end transmission equipment is connected with the filter output of fiber optic protection monitoring device.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are：
1st, the utility model can detect the device of spare fibre and business optical fiber simultaneously there is provided a kind of, there is provided luminous power
Observation circuit realizes the quick detection of spare fibre and business optical fiber, when detecting spare fibre or the failure of business optical fiber
OTDR equipment is enabled again finely to be detected, detects that the position of fracture damage occurs in optical fiber；Using the photoswitch of multiselect one, OTDR
Equipment can be detected with timesharing to business optical fiber and spare fibre, when business optical fiber breaks down, switch to standby light
Fibre carries out signal transmission.
2nd, the testing result of OTDR equipment can also be sent to other pipes in network by the utility model by telecommunication circuit
Manage in equipment, be easy to centralized management.
3rd, the utility model substantially increases the utilization rate of OTDR equipment by the way of two optical switch stacks of multiselect one,
Those skilled in the art know that the cost of OTDR equipment in all kinds of optical fiber measurement equipments is very considerable, up to more than 10 ten thousand yuan of unit price
RMB, the cascade system that the utility model is provided can allow an OTDR equipment to detect a plurality of optical fiber, more save cost.
Brief description of the drawings
Fig. 1 is the structural representation of one specific embodiment of the utility model.
Fig. 2 is the utility model application example.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.
As shown in figure 1, the fiber optic protection monitoring device that the utility model is provided includes：Including controller, optical power monitoring
Circuit, shunt, combiner, wavelength-division multiplex circuit, OTDR equipment, wave filter, switching photoswitch, the photoswitch of one-level multiselect one with
And two grades of photoswitches of multiselect one.
The single-ended a port with many terminals of the photoswitch of one-level multiselect one of the wherein two grades photoswitches of multiselect one is connected；One
Single-ended being connected with OTDR equipment of the level photoswitch of multiselect one.
The a port of many terminals of two grades of photoswitches of multiselect one is connected with the first wavelength-division multiplex circuit, the first wavelength-division multiplex
Circuit is used to be connected with one end of spare fibre, and another port and the second wavelength-division of many terminals of two grades of photoswitches of multiselect one are answered
Connected with circuit, the second wavelength-division multiplex circuit is used to be connected with one end of business optical fiber.
The first choice end of switching photoswitch is used to be connected with the other end of spare fibre, and the second selection end is used for and business
The other end connection of optical fiber, the input of the common port and wave filter that switch switch is connected, the output end of wave filter be used for it is remote
Hold transmission equipment connection.
Input of the first wavelength-division multiplex circuit also with the first shunt is connected, the first output end of the first shunt and the
One optical power monitoring circuit is connected, and the second output end of the first shunt and the first input end of combiner are connected；Second wavelength-division
Input of the multiplex circuit also with the second shunt is connected, the first output end of the second shunt and the second optical power monitoring circuit
Connection, the second output end of the second shunt and the second input of combiner are connected.The output end of combiner is used for and near-end
Transmission equipment is connected.
The controller and the photoswitch of one-level multiselect one, two grades of photoswitches of multiselect one, for controlling both paths to select.
The controller is also connected with OTDR equipment, for controlling being turned on and off and for receiving of OTDR equipment
The testing result of OTDR equipment output.
The controller is also connected with optical power monitoring circuit, the result exported for received optical power observation circuit；
The controller is also connected with switching photoswitch, the strobe state for controlling switching photoswitch.
Controller can select single-chip microcomputer or ARM is realized.
In another embodiment, also including telecommunication circuit；The controller is connected with the telecommunication circuit, for by OTDR
The testing result of equipment is sent to telecommunication circuit, and telecommunication circuit is used to send testing result
The photoswitch of one-level multiselect one and two grades of photoswitches of multiselect one can select 8 select 1 photoswitch, 16 select 1 photoswitch or
Person 32 selects 1 photoswitch.In view of device volume limitation, the present embodiment selects 1 photoswitch from 8.
In another embodiment, the port for many terminals that two grades of multiselects one are switched respectively by a wavelength-division multiplex circuit with
Optical fiber is connected all the way.It so can access the optical fiber on up to 8 tunnels.
The port for many terminals that one-level multiselect one is switched connects the single-ended of two grades of multiselect one switch respectively.Due to each
Two grades of switches of multiselect one can access 8 road optical fiber, by cascade, the road intelligent acess OTDR equipments of Ke Jiang 64.Control two-stage is more successively
The dredging collateral of a switch is selected, just the road optical fiber of Ke Dui 64 is detected.The utilization rate of OTDR equipment is greatly improved, cost is reduced.
Switching photoswitch includes two states, and the first state is that its first choice end is connected with common port；Second of shape
State is that its second selection end is connected with common port.Under the control of switching signal, switching photoswitch can the first state with
Switch between second of state.
The power of the first output end output optical signal of the shunt is more than the work(that its second output end exports optical signal
Rate.That is, each shunt only separates fraction optical signal feeding optical power monitoring circuit and detected.In a preferred embodiment
In, the power ratio that the power of the first output end output optical signal of shunt exports optical signal with its second output end is 1:
99。
Operation principle of the present utility model is illustrated presently in connection with Application Example, it is of the present utility model to be better understood from
Structure.
Referring to Fig. 2, accessed between the wavelength division multiplexer of the utility model first and switching photoswitch first choice end standby
Optical fiber；The access service optical fiber between the second wavelength division multiplexer and the switching selection of photoswitch second end.The output end of wave filter with
Distal end transmission equipment connection.The output end near-end transmission equipment connection of combiner.
Spare fibre wouldn't be come into operation, and business optical fiber comes into operation, and controller control switching photoswitch is in second
Between state, i.e. business intelligent acess distal end transmission equipment and near-end transmission equipment.
When detection starts, two grades of photoswitches of multiselect one and the switch acquiescence of one-level multiselect one connect business optical fiber and OTDR equipment
It is logical.
Wavelength division multiplexer described in the utility model has multiplex and the function of partial wave simultaneously.
Far, communicated between near-end transmission equipment using the optical signal of first wave length.
When business optical fiber is normal, optical signal passes through switching photoswitch and reaches wave filter, and wave filter is by second wave length
Optical signal is filtered, and only the optical signal of first wave length is delivered at the transmission equipment of distal end.Distal end transmission equipment is sent simultaneously
The optical signal of first wave length after filtering device, switching photoswitch, business optical fiber, be transferred to the second shunt, the second shunt will
The first wave length optical signal received is divided into the different two-way of power sharing ratio, and wherein lower-powered optical signal is sent into
Two optical power monitoring circuits are detected.Prestored in optical power monitoring circuit the theoretical emission luminous power of distal end transmission equipment with
And the power distribution ratio of shunt, it also detects received optical power, by theoretical emission luminous power according to power distribution ratio meter
Performance number of the theoretical emission luminous power after branch is calculated, then is subtracted received optical power and just can obtain attenuated optical signal
Amount.
Controller is compared the attenuation of the second optical power monitoring circuit output with a setting thresholding, when more than setting thresholding
Shi Ze thinks that optical fiber occurs in that fracture, and then controller control starts OTDR equipment, and OTDR equipment sends the light letter of second wave length
Number, the optical signal combining for the first wave length that the second wavelength-division multiplex circuit sends the optical signal of second wave length and near-end transmission equipment
After be output on business optical fiber.
When business fibercuts, the optical signal that OTDR equipment sends second wave length can reflect in the breaking part of business optical fiber
Return, the optical signal of return passes through the second wavelength-division multiplex circuit and it is decomposed out, is then passed back to by two-stage photoswitch
In OTDR equipment, OTDR equipment determines the position of business fibercuts and testing result is sent into controller.Controller is simultaneously
Change the state of switching photoswitch, so that with spare fibre substitution service optical fiber.
Then spare fibre is monitored according to above-mentioned same process.
Different from second wave length using first wave length in the present embodiment, such as first wave length is 1550nm/1310nm, the second ripple
A length of 1625nm.
Distal end transmission equipment and transmission equipment of the near-end transmission equipment just for the sake of difference two ends in the utility model
And name respectively.Spare fibre is also relative concept, actually identical optical fiber, that root used with business optical fiber
Optical fiber turns into business optical fiber, untapped to turn into spare fibre.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of fiber optic protection monitoring device, it is characterised in that including controller, optical power monitoring circuit, shunt, combining
Device, wavelength-division multiplex circuit, OTDR equipment, wave filter, switching photoswitch, the photoswitch of one-level multiselect one and two grades of light of multiselect one are opened
Close；
The single-ended a port with many terminals of the photoswitch of one-level multiselect one of the wherein two grades photoswitches of multiselect one is connected；One-level is more
The single-ended of a photoswitch is selected to be connected with OTDR equipment；
The a port of many terminals of two grades of photoswitches of multiselect one is connected with the first wavelength-division multiplex circuit, the first wavelength-division multiplex circuit
It is connected for one end with spare fibre, another port and the second wavelength-division multiplex electricity of many terminals of two grades of photoswitches of multiselect one
Road is connected, and the second wavelength-division multiplex circuit is used to be connected with one end of business optical fiber；
The first choice end of switching photoswitch is used to be connected with the other end of spare fibre, and the second selection end is used for and business optical fiber
Other end connection, the input of the common port and wave filter that switch switch connects, and the output end of wave filter is used for and distal end is passed
Transfer device is connected；
Input of the first wavelength-division multiplex circuit also with the first shunt is connected, the first output end and the first light of the first shunt
Power monitoring circuit is connected, and the second output end of the first shunt and the first input end of combiner are connected；Second wavelength-division multiplex
Input of the circuit also with the second shunt is connected, and the first output end of the second shunt connects with the second optical power monitoring circuit
Connect, the second output end of the second shunt and the second input of combiner are connected；
The output end of combiner is used to be connected with near-end transmission equipment；
The controller and the photoswitch of one-level multiselect one, two grades of photoswitches of multiselect one, for controlling both paths to select；
The controller is also connected with OTDR equipment, for controlling being turned on and off and being set for receiving OTDR for OTDR equipment
The testing result of standby output；
The controller is also connected with optical power monitoring circuit, the result exported for received optical power observation circuit；
The controller is also connected with switching photoswitch, the strobe state for controlling switching photoswitch.
2. a kind of fiber optic protection monitoring device according to claim 1, it is characterised in that also including telecommunication circuit；It is described
Controller is connected with the telecommunication circuit, and for the testing result of OTDR equipment to be sent into telecommunication circuit, telecommunication circuit is used for
Testing result is sent.
3. a kind of fiber optic protection monitoring device according to claim 1, it is characterised in that the optical power monitoring circuit is used
The optical signal come in reception Optical Fiber Transmission, and optical power attenuation amount is detected, and attenuation is transferred to controller.
4. a kind of fiber optic protection monitoring device according to claim 3, it is characterised in that the controller is used for described
When attenuation is less than setting thresholding, two grades of photoswitches of multiselect one, paths of the corresponding optical fiber of the photoswitch of one-level multiselect one are gated,
And start OTDR equipment.
5. a kind of fiber optic protection monitoring device according to claim 4, it is characterised in that the controller is additionally operable in inspection
Business optical fiber is replaced with spare fibre by the strobe state for switching photoswitch when measuring business fibercuts by changing.
6. a kind of fiber optic protection monitoring device according to claim 1, it is characterised in that the multichannel that two grades of multiselects one are switched
The port at end is connected by a wavelength-division multiplex circuit with optical fiber all the way respectively.
7. a kind of fiber optic protection monitoring device according to claim 1, it is characterised in that the multichannel that one-level multiselect one is switched
The port at end connects the single-ended of two grades of multiselect one switch respectively.
8. a kind of fiber optic protection monitoring device according to claim 1, it is characterised in that the first output of the shunt
The power of end output optical signal is more than the power that its second output end exports optical signal.
9. a kind of fiber optic protection monitoring device according to claim 8, it is characterised in that the first output of the shunt
The power ratio that the power of end output optical signal exports optical signal with its second output end is 1:99.
10. application circuit of the one kind based on the fiber optic protection monitoring device described in claim 1 ~ 9 any one, its feature exists
In also including spare fibre, business optical fiber, near-end transmission equipment and distal end transmission equipment；
Wherein, one end of spare fibre is connected with the first wavelength-division multiplex circuit of fiber optic protection monitoring device, spare fibre it is another
One end is connected with the first choice end of the switching photoswitch of fiber optic protection monitoring device；
One end of business optical fiber is connected with the second wavelength-division multiplex circuit of fiber optic protection monitoring device, the other end of business optical fiber with
Second selection end connection of the switching photoswitch of fiber optic protection monitoring device；
Near-end transmission equipment is connected with the output end of the combiner of fiber optic protection monitoring device；
Distal end transmission equipment is connected with the filter output of fiber optic protection monitoring device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720023588.1U CN206332672U (en) | 2017-01-10 | 2017-01-10 | A kind of fiber optic protection monitoring device and its application circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720023588.1U CN206332672U (en) | 2017-01-10 | 2017-01-10 | A kind of fiber optic protection monitoring device and its application circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465450A (en) * | 2017-09-21 | 2017-12-12 | 成都中通嘉业科技发展有限公司 | The switching of transmission services and protection device and control method during a kind of fiber failure |
| CN108055082A (en) * | 2017-11-14 | 2018-05-18 | 烽火通信科技股份有限公司 | A kind of single-fiber bidirectional optical line system based on C-RAN systems |
| CN109274419A (en) * | 2018-10-10 | 2019-01-25 | 骆俊 | Intelligent light transmitting device |
| CN110247700A (en) * | 2019-07-10 | 2019-09-17 | 武汉孚晟科技有限公司 | A kind of intelligent optical cable monitoring system and method with cable protection function |
| CN110266377A (en) * | 2019-06-20 | 2019-09-20 | 国网辽宁省电力有限公司电力科学研究院 | Optical fiber remote detection and scheduling system in a kind of fiber optic network |
| CN114553360A (en) * | 2021-12-30 | 2022-05-27 | 广州芯泰通信技术有限公司 | Intelligent automatic control WDM wavelength division equipment |
-
2017
- 2017-01-10 CN CN201720023588.1U patent/CN206332672U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107465450A (en) * | 2017-09-21 | 2017-12-12 | 成都中通嘉业科技发展有限公司 | The switching of transmission services and protection device and control method during a kind of fiber failure |
| CN107465450B (en) * | 2017-09-21 | 2020-08-04 | 成都中通嘉业科技发展有限公司 | Switching and protecting device and control method for transmission service during optical fiber fault |
| CN108055082A (en) * | 2017-11-14 | 2018-05-18 | 烽火通信科技股份有限公司 | A kind of single-fiber bidirectional optical line system based on C-RAN systems |
| CN109274419A (en) * | 2018-10-10 | 2019-01-25 | 骆俊 | Intelligent light transmitting device |
| CN110266377A (en) * | 2019-06-20 | 2019-09-20 | 国网辽宁省电力有限公司电力科学研究院 | Optical fiber remote detection and scheduling system in a kind of fiber optic network |
| CN110247700A (en) * | 2019-07-10 | 2019-09-17 | 武汉孚晟科技有限公司 | A kind of intelligent optical cable monitoring system and method with cable protection function |
| CN114553360A (en) * | 2021-12-30 | 2022-05-27 | 广州芯泰通信技术有限公司 | Intelligent automatic control WDM wavelength division equipment |
| CN114553360B (en) * | 2021-12-30 | 2023-05-26 | 广州芯泰通信技术有限公司 | Intelligent automatic control WDM wave division equipment |
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Effective date of registration: 20231215 Address after: Room 1105, 11th Floor, Unit 1, Building 1, No. 5, East Railway Station Road, Wuhou District, Chengdu City, Sichuan Province, 610000 Patentee after: Chengdu Laite Meiji Technology Co.,Ltd. Address before: 3rd Floor, Building D, No. 11 Gaopeng Avenue, High tech Zone, Chengdu City, Sichuan Province, 610041 Patentee before: CHENGDU ZHONGTONG JIAYE TECHNOLOGY DEVELOPMENT CO.,LTD. |
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