What are the listed companies of chip ultrapure water?

Jiangnan Water Affairs and CLP Environmental Protection. According to Aiqi's data, the listed companies of chip ultrapure water include Jiangnan Water, CLP Environmental Protection, Tianmao Technology and National Water. Guo Zhong Water Co., Ltd. is a large state-owned enterprise, whose main business is to implement urban water supply, sewage treatment and reclaimed water utilization system.