Farmers work at the field in Dongmen village of Yongzhou city, Central China’s Hunan province, April 5, 2018. [Photo/Xinhua]

Farmers work in the potato field covered with plastic mulch in Xuwa village of Zaozhuang city, East China’s Shandong province, April 5, 2018. [Photo/Xinhua]

A farmer pollinates the fruit tree at the field in Xinzhuang village of Linyi city, East China’s Shandong province, April 5, 2018. [Photo/Xinhua]