listed company
Shenzhen:
Zhou Ming Technology, Abison, Lian Jian Optoelectronics, Lehman Optoelectronics, Alto Electronics.
Shanghai:
Think twice-think carefully
Beijing:
Rivers in western Canada
Unlisted companies:
Desai Optoelectronics, Istar (acquired by Lian Jian Optoelectronics), Tongpu Technology, Mindray Optoelectronics (acquired by Furi Electronics) and Ruituo Display (acquired by Dehao Runda)