Coulee: Hong Kong is an old brand, a well-known enterprise in Hong Kong and one of the top ten pipeline brands. The main products are PPR aluminum-plastic composite pipe and water distribution system.

Rifeng: traditional old brand, the main products are traditional PVC aluminum-plastic composite pipe, pure PPR pipe and water distribution system.

Nanxin: I have been in Zhanjiang for 2 years, mainly to follow the marketing methods of the new brand of Guli.