Aerial photo shows villagers sacking potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

A villager harvests potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

Villagers load sacked potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

A villager harvests potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

Villagers load sacked potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

A villager harvests potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

Villagers load sacked potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

Villagers sack harvested potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)

Villagers harvest potatoes in Zhuozhatan Village of Huzhu Tu Autonomous County, northwest China's Qinghai Province, Oct. 10, 2020. In recent years, the county has been developing the potato industry to help its farmers improve income. (Xinhua/Wu Gang)