Chen, Zhengyong, and Long Huang. “Research on the Current Situation and Countermeasures of Martial Arts Training Institutions in Chongqing”. Economics & Management Review, vol. 4, no. 3, Nov. 2023, pp. 244-60, https://www.masonpublish.org/index.php/the-economics-management-review/article/view/1322.