Mengyun Wu School of Finance and Economics, Jiangsu University, 212013, Zhenjiang, People's Republic of China   Jiangsu University Jiangsu University Zhenjiang, Jiangsu Province 212013 China   mewu@ujs.edu.cn             JEL Areas: G1 : General Financial Markets: General (includes Measurement and Data) N4 : Economic History: Government, War, Law, and Regulation: General, International, or Comparative