According to official website information of postal code database, the postal code of pingshan county in Yibin City is 645350, with the first two digits 64 representing provinces, municipalities and autonomous regions, the third digit 5 representing postal areas, the fourth digit 5 representing counties and cities, and the last two digits 00 representing specific delivery areas.

Pingshan county belongs to Yibin City, Sichuan Province. Pingshan county is located in the southern edge of Sichuan Province, with a total area of 1.504 square kilometers and a permanent population of 245,000. There are 30 ethnic minorities.