No.333 Yuzhong District Popularity Ranking Chongqing No.6 Tu Jian Engineering No.7 Tu Jian Shi Engineering No.9 Qing Jie Technology No.13 Huan Bao Gong Cheng Zhuan Ye Cheng Bag No.19 Wu Ran Zhi Management No.19 Wu Ran Control No.20 Gu Ti Fei Materials No.30 Sewage Treatment No.31 Environmental Engineering Technology No.43 Huan Bao Gong Cheng Shi Engineering No.47 Sheng Tai Bao Hu Gong Cheng Shi Engineering No.50 Environmental Engineering Design 高新技术企业 市级专精特新中小企业 省级高新技术企业 市级创新型中小企业 瞪羚企业 市级高新技术企业 环保工程专业承包