1. Dept. of Construction and Real Estate, School of Management, Harbin Institute of Technology, P.O. Box 1251, 13 Fayuan St., Harbin, China (corresponding author). E-mail: xlxue@hit.edu.cn
2. Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China. E-mail: bsqpshen@polyu.edu.hk
3. Professor, Dept. of Construction and Real Estate, School of Management, Harbin Institute of Technology, P.O. Box 1205, 13 Fayun St., Harbin, China. E-mail: ywwang@hit.edu.cn
4. Associate Professor, Dept. of Construction and Real Estate, School of Management, Harbin Institute of Technology, P.O. Box 1251, 13 Fayuan St., Harbin, China. E-mail: lujf@hit.edu.cn