Zheng Wei Chen

Shanghai Yunhan Science & Technology Co. Ltd. provides environment protection and technology development services. It also engages in the Import and export of electronics equipment. The company was founded on January 26, 2015 and is headquartered in Shanghai, China.

Shanghai Baotong Fainearth Electronic Co., Ltd. engages in manufacture and sale of smart security products. It also distributes cable television controls, burglar alarm and building smart alarm systems and installs electronic and electrical equipment. The company was founded on June 28, 1993 and is headquartered in Shanghai, China.

Shanghai Yunsai Zhilian Information Technology Co., Ltd. engages in the design and construction of intelligent building and automation control projects; construction of communication and safety precaution projects; as well as development of energy-saving and electronic technology. The company was founded on August 6, 2001 and is headquartered in Shanghai, China.