An aerial drone photo taken on March 18, 2025 shows a farmer plowing a field with a machine in Xinglong Village, Tengchong City of southwest China's Yunnan Province. 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 Zhao Hui/Xinhua)