1, advanced. Shanghai Sanlian Group's leading position in science and technology is well deserved, and the scientific and technological innovation project of optical lenses has won five patents.
2. Good technology. The research, development, processing and testing capabilities of lenses in the processing center of Shanghai Sanlian Group have entered the advanced ranks in the world. Maochang, a glasses brand founded in 1923, is a famous trademark in Shanghai and enjoys a high reputation in the market for its superb optometry technology.