No.248 Yizhuang Development Zone Popularity Ranking Beijing No.2 Municipal Sewage No.2 Water Treatment Systems No.2 Sewage Treatment Technology No.4 Zhong Shui Hui Yong No.5 Xun Huan Li Yong No.5 Gong Ye Fei Water Treatment No.6 HSE No.8 Hai Shui Dan Chemical No.8 Ling Pai Fang No.9 Fei Water Treatment No.10 Engineering Design Qualifications No.10 Qing Jie Technology 中关村高新技术企业 专精特新小巨人企业 高新技术企业 企业技术中心 省级高新技术企业 市级高新技术企业 安全生产许可证