(http://bzdt.ch.mnr.gov.cn/browse.html?picId="4o28b0625501ad13015501ad2bfc0272"). (A) The map is based on the standard map service website of the National Bureau of Surveying, Mapping and Geographic Information Service No.GS (2019)1682 standard map drawing, the base map has not been modified. (B) The map projection for the martial arts school was obtained from the Baidu Map API using latitude and longitude data in Python. (C) Using ArcGIS software and applying the kernel density calculation formula (4), the spatial density projection of martial arts schools is derived.