Which manufacturers are the authentic Rifeng pipe industry and where are they located?

there are currently 8 manufacturers of authentic rifeng pipe industry? Specifically, it includes (as of May 222):

No.1 and No.2-Rifeng Foshan Sanshui Base: there are two, one is called Rifeng Sanshui Production Base, and the other is in Foshan Sanshui Industrial Park, which is mainly used for municipal pipeline production;

No.3-Rifeng Tianjin Base: located in Tianjin Wuqing Development Zone, which mainly produces Rifeng PPR, Rifeng PE-RT, PVC and other pipeline products;

No.4-Rifeng Southwest Base: located in Chongqing, it mainly produces heat-resistant reinforced polyethylene pipes, functionalized modified random polypropylene pipes, polyvinyl chloride pipes and corresponding fittings.

No.5-Rifeng Hubei Base: located in Huangshi, Hubei Province, mainly produces Rifeng PPR pipes and fittings, PVC drainage pipes and fittings and other pipeline products;

No.6-Rifeng East China Base: located in Zhenjiang District, Jiangsu Province, mainly engaged in research and development and production of municipal pipes;

No.7-Rifeng Northeast Base: Located in Changchun District, Jilin Province, it mainly produces polypropylene, polyvinyl chloride and polyethylene pipes, and plans to build an enterprise R&D center at present;

the 8th company-rifeng Weinan base in Shaanxi province: mainly produces PPR water supply pipeline and PERT floor heating pipeline? PVC drainage pipes, PVC conduit pipes and other pipes and fittings.