Xi beilin district. According to Baidu map, Rome belongs to Xi 'an Beilin District, located in the southeast of Xi's downtown, adjacent to Lianhu District and Xincheng District respectively, with an area of 23.37 square kilometers. Mule and horse market is a famous commercial center in Xi 'an. Mules and horses were important means of transportation and animal power in ancient times. That year, a large mule and horse trading market was set up in major towns, and then the market gradually formed.