Aerial photo taken on Oct. 21, 2020 shows a starch factory buying potatoes from farmers in Malian Township of Xiji County, Guyuan, northwest China's Ningxia Hui Autonomous Region. An estimated 1.6 million tonnes of potatoes will be harvested this year from crop fields covering about 53,333 hectares in Xiji County. (Xinhua/Wang Peng)

Aerial photo taken on Oct. 21, 2020 shows trucks queuing up in front of a starch factory to deliver potatoes in Malian Township of Xiji County, Guyuan, northwest China's Ningxia Hui Autonomous Region. An estimated 1.6 million tonnes of potatoes will be harvested this year from crop fields covering about 53,333 hectares in Xiji County. (Xinhua/Wang Peng)

Farmers load potatoes at a potato trading center in Xiji County, Guyuan, northwest China's Ningxia Hui Autonomous Region, Oct. 21, 2020. An estimated 1.6 million tonnes of potatoes will be harvested this year from crop fields covering about 53,333 hectares in Xiji County. (Xinhua/Wang Peng)

A farmer counts cash after selling his potatoes to a starch factory in Malian Township of Xiji County, Guyuan, northwest China's Ningxia Hui Autonomous Region, Oct. 21, 2020. An estimated 1.6 million tonnes of potatoes will be harvested this year from crop fields covering about 53,333 hectares in Xiji County. (Xinhua/Wang Peng)