Introduction: Weiwei County is affiliated to Leshan City, Sichuan Province. It is the largest county in Leshan City. It is located on the southwestern edge of the western Sichuan Plain. It is located at 29°1'2" to 29°27'47" and latitude 103°43'35" to 104". °11'48". It is adjacent to the central area of ​​Leshan City in the north, Yibin and Zigong in the industrial base of Sichuan Province in the east, and Mabian River and Jinshajiang Economic Development Zone in the south. It covers an area of ​​1375.4 square kilometers and governs 12 towns and 18 townships with a population of 580,000. It belongs to the subtropical humid climate zone, with four distinct seasons and pleasant climate. It is warm in winter and cool in summer. The annual average temperature is 17.5 °C, the frost-free period is 333 days, the rainfall is abundant, the annual average precipitation is 1141.3 mm, the sunshine is sufficient, and the annual average sunshine is 957.9 hours.