1. China Communications Construction Co., Ltd., Beijing, China
2. Xiamen Metro Construction Co., Ltd., Xiamen, China
3. CCCC First Highway Engineering Xiamen Co., Ltd., Xiamen, China
4. Shanghai Jianke Engineering Consulting Co., Ltd, Shanghai, China
5. Jianfa Hecheng Engineering Consulting Co., Ltd., Xiamen, China
6. Fujian University of Technology, Fuzhou, China