Aerial photo taken on April 19, 2019 shows farmers sowing in a corn field in Changjia township of Gaoqing county, East China’s Shandong province. [Photo/Xinhua]

A farmer works in the field in Sanlian village of Gangbian township, Congjiang county, Southwest China’s Guizhou province, April 19, 2019.[Photo/Xinhua]

A farmer takes care of crops in a greenhouse in Feixiang township of Handan, North China’s Hebei province, April 19, 2019. [Photo/Xinhua]

Farmers plant corn seedlings in Ximen village of Shouchang township, Jiande, East China’s Zhejiang province, April 18, 2019. [Photo/Xinhua]

Aerial photo taken on April 19, 2019 shows farmers working in the field in Wangchuan village of Tancheng township, Yongfeng county, East China’s Jiangxi province.[Photo/Xinhua]