国家社会科学基金项目17BGL123National Social Science Foundation of China17BGL123;国家旅游局科研立项重点项目16TAAK004Key Project of China National Tourism Administration Research Foundation16 TAAK 004;国家旅游局旅游业青年专家培养计划项目TYETP201527Tourism Young Expert Training Program of China National Tourism Administration TYETP201527;中国博士后科学基金项目2016M591241China Postdoctoral Science Foundation2016M591241