No.415 Changping District Popularity Ranking Beijing No.6 Hei Chou Shui Ti No.10 Sleeves Pipes No.15 Electrical Automation No.16 Reclaimed Water No.17 Engineering Investment No.23 City Water Supply No.24 Zi Lai Shui Gong Ying No.25 Water Supply No.44 Shui Wu Ji Chu Facilities No.44 Water Management No.46 Water Conservancy Hydropower Engineering No.46 Drainage Systems 瞪羚企业 中关村高新技术企业