Farmers work in a field in Luancheng District of Shijiangzhuang, north China's Hebei Province, in this aerial photo taken on April 18, 2020. The upcoming Guyu, literally meaning "Rain of Millet", is the sixth of the 24 solar terms created by ancient Chinese to carry out agricultural activities. For the year 2020, the day of Guyu falls on April 19. (Photo by Li Mingfa/Xinhua)