Shanghai Yongjian Instrument & Equipment Co., Ltd. is a high-tech enterprise located in Fengxian District, Shanghai. It is the first company in China to research, develop, produce, and sell electrostatic sterilization air purification series products. The company also undertakes air purification projects for central air conditioning systems, fresh air system projects, indoor air purification equipment, and develops medical and environmental protection products related to electrostatic sterilization technology. Additionally, it has been approved by the State Science and Technology Commission as a technological support organization.