1. From Persia. Polo, also known as Persian ball, is mainly said by European scholars. In addition, there are such things in Feng's notes, so it is considered to be introduced during the period of Emperor Taizong.

2. From Tibet (that is, Tubo at that time). During the Tang Zhongzong period, there was a polo match between the Tang Dynasty and Tubo, and the Tubo people defeated the Tang Horse Team. Fortunately, Li Longji and others took the stage to defeat the Tubo polo team. It says that Tubo people often play polo, which shows that it has become a custom. To this day, some people who live there still play polo.

3. Originated from the Central Plains. Mainly from a poem by Cao Zhi, which describes something similar to polo. So some people think that it originated in the Central Plains at the end of Han Dynasty. Of course, some people think that it originated in the Tang Dynasty and then spread to other places.

4. Originated from northwest minorities. It is said that during the period of Emperor Wu of the Han Dynasty, Huo Qubing and Wei Qing brought Cuju (playing football on the ground) to the Western Regions, and then the people in the Western Regions immediately evolved into Cuju and polo.

If you are interested, you can download this paper "Comparison of the Origin of Ancient Polo in China" from the Internet. It says it in more detail.