Han River.

The Han River is the longest tributary of the Yangtze River. It flows through Mian County (now Mian County) and is called Mianshui. Mandarin fish live in it, so Mian County mandarin fish are distributed in the Han River.

Mian County, affiliated to Hanzhong City, Shaanxi Province, is located in the west of Hanzhong City, bordering Hantai District to the east, Nanzheng County to the south, Ningqiang County and Lueyang County to the west, and Liuba County and Liuba County to the north. It borders Liangdang County in Gansu Province, with an area of ??2,406 square kilometers. As of October 2022, Mian County governs 1 subdistrict and 17 towns. In 2021, the total population of Mian County is 408,940.