SGS is the world's leading inspection, appraisal, testing and certification institution, and is recognized as the benchmark of quality and integrity. SGS has more than 95,000 employees in more than 2,400 branches and laboratories around the world, forming a global service network.

2. China Testing and Certification Group Co., Ltd. ..

Shanghai Huace Testing Technology Co., Ltd. (abbreviated as CTI Huace Testing), as the pioneer and leader of third-party testing and certification services in China, provides one-stop testing, inspection, certification, measurement, audit, training and technical services for customers all over the world.

3. Guangzhou Radio and Television Metrology and Testing Co., Ltd. ..

Guangzhou Radio and Television Metrology and Testing Co., Ltd. was established on 1964 and landed on the small and medium-sized board on 201.8. It was the first stock listed in Guangzhou's state-owned assets system in 20 19. The radio and television meter is an electronic 602 metering station of the former Ministry of Information Industry, which has been developed for more than 50 years.