1. Institute of Strategic Planning, Shandong Academy of Macroeconomic Research, Jinan 250014, China
2. School of Economics and Management (School of Tourism), Dalian University, Dalian 116622, China
3. School of Marine Law and Humanities, Dalian Ocean University, Dalian 116023, China
4. School of Economics and Management, Dalian Ocean University, Dalian 116023, China