1. Zhengde Polytechnic College, Department of Public Education, Nanjing, Jiangsu, China
2. Adamson University, Graduate School, Metro Manila, Philippines
3. Nanjing University of Aeronautics and Astronautics, Department of Physical Education, Nanjing, Jiangsu, China
4. Sanjiang University, Department of Physical Education, Nanjing, Jiangsu, China