1. Shanghai Yongshi Electronics Co., Ltd., focusing on environment and safety, is a member unit of the China Industrial Boiler Association. The company focuses on environmental measurement and industrial production, targeting industries such as cold chain logistics, energy conservation and emission reduction, HVAC, etc. Its core personnel have more than 10 years of experience in instrument industry services, and have established close cooperation with Testo, Fourtec from Israel, Optris from Germany, JENCO from the United States, ExternalCH from the United States, and ZogLab. Our values and mission: integrity-based, dedicated to creating value for customers, advocating a corporate culture of "unity, love, tension, and liveliness", creating growth space for employees, and striving to make our living environment better and safer. Our products and services: Instruments: 1 German Testo: portable smoke analyzer, infrared thermal imager, anemometer, temperature and humidity meter, temperature and humidity recorder, etc. 2. Afrisio, Germany: Boiler flue gas analyzer 3. Optris, Germany: Portable infrared thermometer, online infrared thermometer, online infrared thermal imager, blackbody furnace. 4. JENCO: Portable desktop industrial online pH meter, conductivity meter, dissolved oxygen meter. 5. Fourtec Israel: Multi channel heat flow meter, Datanet wireless monitoring system. 6. Zoglab: Temperature and humidity recorder, temperature and humidity networking system product.