In this aerial photo taken on April 20, 2019, farmers work in a field in Tianxin Village of Sitang Township, Lingui District, Guilin, south China's Guangxi Zhuang Autonomous Region. 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 2019, the day of Guyu falls on April 20. (Xinhua/Wang Zichuang)