No.702 Shanghai Popularity Ranking No.35 Changning District No.1 Water Conservancy Hydropower Engineering No.1 Drainage Engineering No.2 Water Pipes No.2 Engineering Technology Services No.3 Water Engineering No.3 Water Services No.3 Water Safety No.3 Pipes No.3 Shui Wu Gui Hua No.3 Water Construction No.4 Water Investment No.4 Surveying and Mapping 理事单位 常务理事单位 发明专利 高新技术企业 市级专精特新中小企业 专精特新小巨人企业 安全生产许可证