HomeSupplier Discoveryarrow-rightElectrical & Electronicsarrow-rightGas Sensorarrow-rightOxygen Sensor Factories & Companies
Filter
Category
More
Management Certification
More
R&D Capacity
Annual Revenue
More
No.of Employees
More
Province & Region
More
about oxygen sensor
  • Technological Innovation
  • Reliable Supply Chains
  • Substantial Manufacturing Capabilities

oxygen sensor1,000+ factories verified

Hunan Chntek Sensor Technology Co., Ltd

21 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Pressure Sensor
Country/Region:
Hunan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Hunan Chntek Sensor Technology Co., Ltd. is a special semi-conductor company in Hunan, China. It is near the Changsha Huanghua International Airport, and focuses on the metal-based sputtering thin film pressure-sensitive elements and related pressure sensors. Itsmanufactory has 100 class cleaning factory buildings of 6000 square meters, in which there is a production line of pressure-sensitive elements and a fully automaticpackaging line of the pressure sensors.

Kailong High-Technology Co., Ltd.

Main Products:
Exhaust After-Treatment System & Parts, Urea Sensor & Parts, Catalyst, Urea Pump
Country/Region:
Jiangsu, China
Sample Service:
Sample Available
Company Profile:
Established in 2001, Kailong High technology is a national high-tech enterprise that integrates research and development, production, sales, and after-sales service. It is a national enterprise technology center, an experimental center recognized by the China National Accreditation Service for Conformity Assessment (CNAS), and a national postdoctoral research workstation. Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.

REX (Shanghai) Technology Co., Ltd.

16 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Electrodes, Magnetic Stirrer, Electrode Accessories, Cables, Connectors, Instruments and Meters, Solutions
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
In 1940, "Rex" gave birth to China's first pH meter and first glass electrode, marking the birth of Chinese analytical instruments. As the first professional manufacturer of analytical instruments in China, "Rex" has been focusing on the innovation and accumulation of electrochemical analysis instruments with more than half a century. "Rex" has unique advantages and status. The product categories are constantly expanding and the technical level is increase. "Rex" has more than 100 kinds of electrochemical analysis instruments, sensors and application solutions, including all kinds of instruments, such as laboratory, online and on-site testing, taking the lead of the domestic electrochemical analytical instrument industry and catching up with the international advanced level.

Guangdong Jiepute Technology Co., Ltd

12 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Thermistor, Temperature Sensor, Temperature Switch
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Guangdong Jiepute Technology Co., Ltd., established in 2015, specializes in electronic temperature protection components. We focus on the R&D, production and sales of NTC thermistors and temperature sensors, which are extensively applied in automotive electronics, communication devices, industrial equipment, power supplies and consumer electronics.

Wenzhou Huikemaiyi Auto Parts Co., Ltd

10 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Suspension Sensor, Height Sensor, Level Sensor, Camshaft Position Sensor, Crankshaft Position Sensor, Yacht Sensor, Steering Sensor, Headlight Level Sensor, ABS Sensor
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Huikemaiyi Company was established in 2017 year and its a High-tech enterprise committed to the R&D, Production, and Sales of various Auto Sensors products, such as suspension sensor,  height sensor, level sensor, Camshaft position sensor,  crankshaft postion sensor, yacht sensor, steering sensor, headlight level sensor, ABS and Oxygen sensors etc.

Cangzhou Qirun Detecting Instrument Co., Ltd.

17 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Thermocouple, Disposable Thermocouple, Sampler, Multi-Use Thermocouple, Molten Steel Thermometer‬, Sublance Probe, High Carbon Projectile Probe
Country/Region:
Hebei, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Cangzhou Qi Run Detecting Instrument Co., Ltd was established in 1996, formerly known as "Nanpi Xieli Electronics Factory", which was a professional manufacturer of detecting and sensing instrument in metallurgical industry. Company covers an area of 5, 000 square meters. The area of construction is 25, 000 square meters. And more than 200 motivated employees work for our company. We own lots of major production workshop including stamping, machining, casting, paper tube, complete equipment, thermal instrumentation, research and development. More than 95% of parts are self-made, which effectively reduce the cost and enhance competitiveness. Now, our annual producing capacity are 500, 000 sets of QR-TSO, 3 million samples of samplers, 5 million sets of sampler parts, 60 million rapid thermocouples, 500, 000 pieces of oxygen probe. In addition to the domestic steel companies, we also export our products to he United States, Japan, Australia, Thailand, Mexico, Colombia, Pakistan, and more than 10 countries and regions.

JIDE LTD

6 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Conductivity Online Analyzer, pH Online Analyzer, COD Online Analyzer
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
JIDE Ltd is a leading manufacturer and supplier of industrial measurement instruments, dedicated to providing high-quality solutions for factory owners, engineers, and other professional B2B clients around the world.

Suzhou Yosemite Technologies Ltd.

14 yrs
·Manufacturer/Factory & Trading Company
Main Products:
UV 254 Cod Sensor, Instruments, Accessories, Systems, Nh4 Sensor, Multiparameter Sonde, Turbidity Sensor, Online Optical Dissolved Oxygen Sensor
Country/Region:
Jiangsu, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Headquartered in Suzhou Industrial Park, China, Yosemite Technologies designs and manufactures water quality monitoring equipment. Combining optical sensing and mobile internet technologies, Yosemitech brings innovative and cost competitive solutions to global water quality monitoring market. Yosemitech provides smart dissolved oxygen sensors based on state of art luminescent lifetime technologies. With different configurations intended for both field and laboratory uses, our products are ideal for measuring dissolved oxygen in wastewater, drinking water, aquaculture and general water quality applications.

Hunan Firstrate Sensor Co., Ltd.

17 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Pressure Transmitter, Differential Pressure Transmitters, Temperature Transmitter, Wind Speed Sensors, Wind Direction Sensors, Fuel Level Sensor, Capacitive Liquid Level Transmitter
Country/Region:
Hunan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Firstrate Sensor Co., Ltd., is a hight-tech joint venture specialized in researching, manufacturing, and sales of sensors. Our products include Pressure Transmitters, Temperature transmitters, Liquid-level Transmitters, Wind Speed and Direction Transmitters, and Intelligent Control Instruments. They are widely used in the field of aviation, aerospace, national defense, military project, engineering machinery, railway, urban railway system, automotive electronics system, HVAC, air compressor, textile, petrochemical, coal mines and other industrial automation control.

Shanghai Kuosi Electronic Co., Ltd.

Main Products:
Dosing Pump, Diaphragm Pump, Water Quality Analyzer, Dosing System, Flow Meter, Liquid Mixer, Water Pump, Chemical Pump, Filter Press, Solenoid Valve
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Through the accumulation of years of industry, we hope that through our efforts to bring China's good water treatment products to the world, China's water treatment environment, relatively more comprehensive, more severe. Therefore, we are confident to provide better service and product prices. We supply metering pumps, water quality instruments, flow meters, water pumps, etc. Our professional ability in the water treatment industry will also provide better technical support to our partners.

Shanghai GL Environmental Technology Co., Ltd.

Main Products:
Diaphragm Pump, Dosing Pump, pH Meter, Conductivity Meter, Flow Meter, Level Meter, Pressure Transmitter, Liquid Mixer, Chemical Pump, Dosing System
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
As a global leader in the water and waste management sectors, we have been operating for over 18 years all over the world. We provide essential services to protect the resource and improve quality of life wherever we operate.

Shanghai Zhichen Technology Co., Ltd

4 yrs
·Trading Company
Main Products:
Ignition Coil, Auto Sensors, Hub Unit, Power Steering Pump, Fuel Injector Nozzle, Control Valve, Ignition Wire, Paper Sauce Cups.
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Shanghai Zhichen Technology Co., Ltd, located in Shanghai, China, is a focus on auto parts import and export trade company, We have created high technical requirements and strict guality control standards through cooperation with well-known universitiesand manufactures. Market-oriented and satisfying the customers are the guideline for product development. Till now over 20categories of commodities which can be used on over 10 thousand model of cars can be provided, which meet the needs of variousregions and countries...Zhichen company that provides high quality auto parts products and sincere service for partners. Company orientation: Supply auto parts of engine management system and offer high-guality service

Anhui Madsur Technology Co., Ltd.

6 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
pH Meter, Cod Sensor, Multi-Parametes Analyzer, Water Quality Analyzer, Coductity, Turbidity, Dissolved Oxygen, Doppler Flowmeter, Suspended Solids
Country/Region:
Anhui, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
MADSUR is a modern production-oriented company specializing in the research, development, production, and sales of intelligent instruments, water quality analyzer instruments, COD analyzers, ammonia nitrogen analyzers, online suspended solids monitors, total phosphorus analyzer, online water hardness monitors, online dissolution monitors, online residual chlorine monitors, total nitrogen analyzer, multi parameter water quality monitors, online turbidity monitors, and online monitoring equipment. With a comprehensive and scientific quality management system, we consistently deliver high-quality products and technical support, along with reliable after-sales service. Our company primarily focuses on technology development, technical consulting, technical services, technology transfer, and the production and sales of optical equipment, water quality testing equipment, as well as the fields of intelligent technology, automation technology, optical technology, and detection technology. Engaged in the import of goods and technology. We have a professional product and sales technology team, with businesses covering multiple countries and building a global business and service network.

Nanning Nobo Instrument Co., Ltd.

12 yrs
·Manufacturer/Factory & Trading Company
Main Products:
PH Meter, Dissolved Oxygen, Residual Chlorine, Ozone, Cod Ammonia Nitrogen, Conductivity, TDS, Turbidity Mlss, Acid and Alkali Meter, Water Quality Meter, Soil Analyzer, Environmental Analyzer
Country/Region:
Guangxi, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
NOBOTECH is a high-tech group specializing in the design, R&D, production, sales, and service of environmental monitoring solutions. The company has offices in Shanghai and Guangzhou, with a factory and R&D center in Nanning, Guangxi, covering an area of over 3, 000 square meters. We focus on the independent development of intelligent analytical instruments, integrating technologies such as the IotNobo IoT platform, cloud services, and AI agent models. Our products measure parameters including pH/ORP, dissolved oxygen, conductivity, residual chlorine, ozone, turbidity, COD, ammonia nitrogen, total phosphorus, total nitrogen, chlorophyll, blue-green algae, color, air pressure, wind speed, wind direction, soil temperature and humidity, and soil NPK, etc. NOBOTECH has built a comprehensive solution system for scenarios like water quality monitoring, meteorological monitoring, soil moisture monitoring, and scientific research, providing full-chain digital support for urban governance, ecological protection, industrial production, and public health.

Shanghai Chunye Instrument Technology Co., Ltd.

9 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
pH Meter, Conductivity Meter, Dissolved Oxygen Meter, Turbidity Meter, Free Chlorine Analyzer, All Kinds of Sensors for Water Analyzer, TDS Meter, Ammonia Tester, Pressure Transmitter
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Company Profile:
Shanghai Chunye Instrument Technology Co., Ltd. is a leading manufacturer, supplier, and exporter of water analysis instruments.

Shanghai Boqu Instrument Co., Ltd.

20 yrs·5.0
·Manufacturer/Factory
Main Products:
PH, ORP, Conductivity, Dissolved Oxygen, Residual Chlorine, Turbidity, TSS, Ion Ammonia Nitrogen, Nitrate Nitrogen, Blue-Green Algae, Chlorophyll A, COD Analyzer & Sensor (electrode)
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Shanghai Boqu Instrument Co., Ltd was established in 2007, and located in Kangqiao Town Pudong New Area Shanghai. It is the professional manufacturer of electrochemical instrumentation and electrode combine with the R&D, production and sales. The main products include pH, ORP, conductivity, ion concentration, dissolved oxygen, turbidity, alkali acid concentration and electrode etc.

Henan Bingsheng Industrial Co., Ltd.

9 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Sensor, Instrument
Country/Region:
Henan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Henan Bingsheng Industrial Co., Ltd. is a high-tech enterprise engaged in the research and development, production, sales, and service of high-end intelligent sensors and automation equipment, located in the High tech Zone of Zhengzhou City. The company focuses on independent research and manufacturing of online monitoring equipment for environmental protection, water industry, agriculture and other related industries. The products include online water quality sensors such as pH, ORP, conductivity, dissolved oxygen, turbidity, residual chlorine, chlorophyll, blue-green algae, and online soil moisture sensors such as oxygen content, temperature and humidity, and full parameters (temperature+humidity+conductivity+pH+nitrogen, phosphorus, and potassium). The company has cutting-edge technology and independently developed and produced a water quality multi parameter online monitoring instrument, which has advantages such as high accuracy and long service life. It can be customized for design and production according to different customer application scenarios. Leading excellence with wisdom and improving development with creativity, Henan Bingsheng Business Co., Ltd. Always adheres to the development concept of "application first, customer first", and strives to promote the rapid development of water conservancy and agricultural IoT sensing technology!

Hunan Rika Electronic Tech Co., Ltd.

11 yrs·5.0
·Manufacturer/Factory & Trading Company
Main Products:
Weather Station,Wind Sensor,pH sensor,Turbidity sensor,Radiation Sensor,Temperature Humidity Sensor,Rain Gauge,Pyranometer,Soil Sensor,Level Sensor,Road condition sensor,etc.
Country/Region:
Hunan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Hunan Rika Electronic Tech Co., Ltd, located in Changsha, is a privately held sensor manufacturer and solution provider of environmental & Weather monitoring for 10+ years.

Shanghai Boqu Instrument Co., Ltd.

20 yrs
·Manufacturer/Factory & Trading Company
Main Products:
Water Quality Analyzers, Water Quality Sensors.
Country/Region:
Shanghai, China
R&D Capacity:
OEM/ODM Service
Company Profile:
BOQU Instrument focuses on technological innovation in water quality analyzers and water quality sensors since founded at 2007. Now staff is over 100 people and with an annual growth rate of 35%. We have own R & D center, many senior engineers has over 10 years R& D experience...Now BOQU has got more than 50 technical certificates for controller software and over 20 technical patents, therefore we won the National High-tech Enterprise Certificate in 2010. At present, the annual quantity of water quality sensors and meters is over 100, 000PCS, it let BOQU instrument become the biggest factory in water quality analyzers in Shanghai China.

Ruian Shengliang Trading Co., Ltd.

Main Products:
Cooling System Parts, Suspension Parts, Engine Parts, Sensor Parts, Chassis Parts
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Somos una empresa dedicada a la fabricació N y a la comercializació N de repuestos PARA automotores, especialmente piezas de motor, chasis, suspensió N, refrigeració N y sensores PARA los modelos japoneses, coreano y norteamericanos.

HONDE TECHNOLOGY CO., LTD.

10 yrs
·Trading Company
Main Products:
Water quality sensor, Soil sensor, Weather station, Air gas sensor, Weather sensor, Water flow sensor, Intelligent agricultural machinery
Country/Region:
Beijing, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
Honde Technology Co., Ltd. Founded in the year of 2011, the company is an lOT company dedicated tothe R&D, production, sales of smart water equipment, smart agriculture and smart environmental protection and the related solutions provider which can be widely used in smart agriculture, aquaculture, river water quality monitoring, sewage treatment of water quality monitoring, soil data monitoring, solar photovoltaic power monitoring, environmental protection meteorological environment monitoring, agricultural meteorological environment monitoring, power weather monitoring, agricultural greenhouse data monitoring, animal husbandry farming environment monitoring, factory production workshop and office environment monitoring, mining environment monitoring, river water level data monitoring, underground pipe water flow network data monitoring, agricultural open channel monitoring, mountain flood disaster warning monitoring, gas monitoring and smart agricultural lawn mower, drone, spray machine and so on.

Guangzhou Chaopao Automotive Parts Co., Ltd.

10 yrs
·Trading Company
Main Products:
Auto Parts
Country/Region:
Guangdong, China
Sample Service:
Sample Available
Company Profile:
DOXNEW is a source manufacturer of automotive parts from China, specializing in the production and global distribution of various complete vehicle components. We produce a wide range of parts daily, ensuring a sufficient supply of pumps, engine components, chassis parts, body parts, and electrical wiring harnesses for all types of vehicles. Our products are diverse, highly durable, and heat-resistant, offering excellent quality at competitive prices.

Prose Corporation

9 yrs·5.0
·Trading Company
Main Products:
Auto Alternator, Auto Starter, Steering Rack, Throttle Body, Auto Sensor, Control Arm/Crossmember, Power Steering Pump, Fuel Injector, Ignition Distributor, Turbocharger
Country/Region:
Chongqing, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Prose Corporation is one of the leading supplier of auto spare parts in China. We supply quality, inexpensive, OE replacement parts for suspension system, brake system, electrical sensor system and so on. Our main product lines are automotive drive system, steering system, suspension system, engine system, brake system, clean system, cooling system and others. The factories we invested and joined have obtained ISO9001 and TS16949 certificates.

Guangzhou Jiahe Auto Parts Firm

9 yrs·5.0
·Trading Company
Main Products:
Fuel Pump Assembly, Throttle Body, Fuel Pump, Power Steering Rack, Fuel Filter, High Pressure Fuel Pump, Oxygen Sensor, Water Pump, Ignition Coil, Power Steering Pump, Fuel Injector, Control Arm
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
    Welcome to Guangzhou Jiahe Auto Parts Firm. Our Company Is Located In Baiyun District, Guangzhou, Guangdong, China. Guangzhou Jiahe Auto Parts Firm Was Established In Guangzhou 2017. We Mainly Provides After-Market Products For Fuel Injector System, Steering System, Engine Systems, Suspension Systems And Cooling Systems, Transmission Systems For Japanese, American, German, French And Chinese Cars, Committed To Providing Customers With High-Quality, All-Round Shopping Services.

Sichuan Mighty Machinery Co., Ltd.

13 yrs·5.0
Main Products:
Shock Absorber, Control Arm, Ball Joint, Tie Rod End, Steering Rack, Wheel Hub Bearing, Car Radiators, Condensers, Car Air Filters Oil Filters, Car Sensors
Country/Region:
Sichuan, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
We supply a wide range of high-quality auto chassis parts, including shock absorbers, control arms, ball joints, stabilizer links, tie rod ends, wheel hub bearings, suspension bushings, CV joints, steering racks, coil springs, and more. Our products offer reliable performance, durable quality, competitive wholesale prices, and are suitable for various vehicle models worldwide.

Wenzhou Bee Automobile Parts Co., Ltd.

Main Products:
Throttle Body, Mass Air Flow Sensor, Oxygen Sensor, Nox Sensor, Fuel Injector, Carburetor, Ignition Distributor, Ignition Coil, EGR Valve, Thermostat Housing
Country/Region:
Zhejiang, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Wenzhou Bee Automobile Parts Co., Ltd. Was established in 2006 and is located in Wenzhou, one of the most important automotive parts manufacturing bases in China. With over 18 years of industry experience, we have grown into a professional supplier specializing in the export of engine management and fuel system components. Our annual export sales reach USD 20-30 million, demonstrating our strong capability and stable presence in the global aftermarket.

Ningxia Maiya Sensor Technology Development Co., Ltd

5.0
Main Products:
Gas Analyzer, Gas Detector, Portable Gas Detector, Fixed Gas Detector, Gas Sensor, Eletrochemical Gas Sensor, Ndir Gas Sensor, Pid Gas Sensor, Air Quality Monitoring System
Country/Region:
Ningxia, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
In a wide array of production and application scenarios - including petroleum, chemical engineering, metallurgy, steel making, sewage treatment, parking lots, breeding farms, laboratories, clean energy, breweries, and refrigeration equipment - the risk of leakage from various toxic, harmful, and flammable gases (such as hydrogen, VOCs, oxygen, and hydrogen sulfide) persists, posing potential threats to personnel safety and production activities. MaiYa Sensor is dedicated to the R&D, manufacturing, and sales of a full range of gas detection products, delivering safety protection for personnel and production activities across industrial, commercial, environmental protection, and other sectors. Our product portfolio covers seven major series: Gas sensors, intelligent gas sensor modules, fixed gas detectors and central control systems, portable gas detectors, handheld gas analyzers, online gas monitoring systems, and IoT monitoring platforms. Globally, MaiYa Sensor has provided gas detection solutions for over 1, 000 industry-specific scenarios. We offer end-to-end comprehensive services, from initial consultation and system design to on-site installation. We are committed to delivering true one-stop gas detection solutions and ultra-efficient gas detection services.

Guangzhou Goson Autopart Co., Ltd

2 yrs
·Trading Company
Main Products:
Ignition Coil, Fuel Pump, Nozzle, Fuel Pump Assembly, ECU, ABS SENSOR, Oxygen Sensor, Water Temperature Sensor, Idle Speed Motor
Country/Region:
Guangdong, China
R&D Capacity:
OEM/ODM Service
Sample Service:
Sample Available
Company Profile:
Guang zhou Best electric spray Co., Ltd. Specializes in electronic components of various types of vehicles.

Guangzhou Fengming Auto Parts Co., Ltd.

13 yrs·5.0
·Trading Company
Main Products:
Auto Part, Spark Plug, Filters, Clock Spring, Water Pump, Timing Chain Kit, Engine Mount, Gasket Kit, Control Arm, Steering Rack
Country/Region:
Guangdong, China
R&D Capacity:
ODM Service
Sample Service:
Sample Available
Company Profile:
Guangzhou Fengming Auto Parts Co., Ltd. is a professional and leading company specialized in auto spare parts sales since 2010 in guangzhou of China.