Zhu Zhanji of Ming Xuanzong was an emperor who loved cultural and sports entertainment. He actively participated in sports activities in the imperial garden.
From the beginning of the volume to the end, the activities are: archery, kicking, kicking,. pounding and pitching. The origin of pounding pills can be traced back to earlier, and its evolution begins with polo (Baltic polo), known as "Baltic ball" or "Balti polo" in Chinese.