1. Dept. of Construction and Real Estate, School of Management, Harbin Institute of Technology, Harbin 150001, China (corresponding author).
2. Dept. of Building and Real Estate, The Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China.
3. Div. of Built Environment, Faculty of Advanced Technology, Univ. of Glamorgan, Pontypridd, Wales CF37 1DL, U.K.