No.61 Tongzhou District Popularity Ranking Beijing No.2 Fang Chan Zhuang Xiu No.4 Dian Jie Cobalt No.5 Pipelines Engineering No.7 Petrochemicals Engineering No.8 Construction Technology No.9 Overseas Engineering No.12 Steel Structure Engineering No.16 Steel Structure Construction No.18 Steel Structure Materials No.21 Steel Structure No.28 Decoration Decoration No.30 Petrochemicals 中关村高新技术企业 高新技术企业 省级高新技术企业 产品专利 市级高新技术企业 专精特新小巨人企业