Farmers drive machines to fertilize wheat field in Santun Village, Zaozhuang City of east China's Shandong Province, March 19, 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 Sun Zhongzhe/Xinhua)