No.52 Yongchuan District Popularity Ranking Chongqing No.1 Di Ban Cai Nuan No.2 Floor Heating Systems No.2 Water Pipes No.3 Hardware Pipes Parts No.4 Pipes and Fittings No.6 Pipes No.7 Polyethylene PE No.7 Water Supply and Drainage Engineering No.8 Water Supply and Drainage Design No.9 Water Supply and Drainage No.13 Drainage Systems No.22 Drainage 高新技术企业 省级高新技术企业 绿色工厂 市级高新技术企业