1. Assistant Professor, Dept. of Public Administration, Hunan Univ., No.2 Lushan Rd., Changsha 410082, China (corresponding author).
2. Professor, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China.
3. Research Fellow, Dept. of Building and Real Estate, Hong Kong Polytechnic Univ., Hung Hom, Kowloon, Hong Kong, China.