The 4nm chip is produced by TSMC, and the listed companies are Tongfang Guo Xin, Zhongying Electronics, Wansheng, Quanzhi Technology, HKUST Venture Capital, Nasda, Zhongke Chuangda, Fang Ying, Zhao Yi Innovation, Fuhanwei and Beijing Zheng Jun.
4nm chip, that is, the chip is made of 4 nm.