[Lu, Shaojing; Zhang, Honglei; Zhang, Jie] Nanjing Univ, Dept Land Resources & Tourism Sci, Nanjing 210093, Jiangsu, Peoples R China.
[Cheng, Shaowen] Huazhong Normal Univ, Sch Urban & Environm Sci, Wuhan, Peoples R China.
[Shi, Chunyun] Xuzhou Normal Univ, Sch Urban & Environm Sci, Xuzhou, Peoples R China.
[Zhang, Honglei] Nanjing Univ, Dept Land Resources & Tourism Sci, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China.