A man rides a tractor working in the field at Xiaozhuang Township in Chiping County, east China's Shandong Province, April 20, 2018. Farmers are busy with planting these days, as April 20 is Guyu (Grain Rain), one of the 24 solar terms created by ancient Chinese to carry out agricultural activities according to position of sun at the zodiacal circle. (Xinhua/Zhao Yuguo)