Central and Southern China Municipal Engineering Design Research Institute
China Nonferrous Metals Industry Changsha Investigation and Design Research Institute
China Research Institute of Radio Wave Propagation
China Research Institute of Radiowave Propagation
China Research Institute of Radio-wave Propagation
China Research Institute of Radiowave Propagation Qingdao Branch
China Research Institute of Radiowqve Propagation
South China Research Institute of Tropical Crops Processing
East-China Design Institute of Forestry Inventory Planning
East China Architectural Design Research Institute Co.
Zhejiang Urban and Rural Planning Design Research Institute
Beijing Urban Construction Exploration Surveying Design Research Institute Co.Ltd.
Anhui Province Bengbu Surveys Design Research Institute
Beijing Geo-engineering Design Research Institute
Chengdu Programme and Design Research Institute
Design Research Institute of Changsha
Gansu Non-ferrous Engineering Exploration and Design Research Institute
HangZhou Design-research Institute of Exploration and Surveying