What mask factories are there in China at present?

There are Qingyi Optoelectronics, Luwei Optoelectronics and Wuxi China Resources. China mask factory has Qingyi Optoelectronics, Luwei Optoelectronics and Wuxi China Resources. Qingyi photoelectric technology is in a leading position in China. Shenzhen Qingyi Optoelectronic Co., Ltd. (hereinafter referred to as "the company") was established in August 1997, and was transformed from Qingyi Precision Optoelectronic (Shenzhen) Co., Ltd. as a whole.