Farmers cultivate watermelon seedlings in Beixinzhuang Village, Kaifeng City of central China's Henan Province, March 18, 2025. With the approaching of spring equinox, or Chunfen in Chinese, the fourth solar term in the Chinese lunar calendar which will fall on March 20 this year, farmers across the country are busy working at fields. (Photo by Li Junsheng/Xinhua)