Farmers work at a potato field in Tangshan, North China’s Hebei province, March 18, 2018. [Photo/Xinhua]

Farmers work at a field in Yongjing, Northwest China’s Gansu province, March 19, 2018. [Photo/Xinhua]

Farmers work at a potato field in Tangshan, North China’s Hebei province, March 18, 2018. [Photo/Xinhua]

Farmers work at a field in Yongjing, Northwest China’s Gansu province, March 19, 2018. [Photo/Xinhua]

Farmers work at a field in Wuyi, East China’s Zhejiang province, March 18, 2018. [Photo/Xinhua]

A farmer works in the paddy field of Qidu township in Yongfeng county, East China’s Jiangxi province, March 20, 2018. [Photo/Xinhua]

Farmers plant vegetables in the field of Guzhou township in Rongjiang county, Southwest China’s Guizhou province, March 20, 2018. [Photo/Xinhua]

Farmers plant vegetables in the field of Tangquan township of Zunhua city, North China’s Hebei province, March 20, 2018. [Photo/Xinhua]