What are the two solar terms of Qinggu Tian? How are they explained?

1 and 24 solar terms, Valley Clearing Day refers to Qingming and Grain Rain solar terms.

2. The Valley Clearing Day comes from the 24 solar terms Song Dynasty: Spring rain starts the Valley Clearing Day in spring, summer is full of mountains, and summer is even hot. Autumn dew, autumn frost, little snow in winter and cold in winter. The first half of the year is June 2 1 day, and the second half is August 23. The two festivals remain unchanged every month, with a maximum difference of one or two days.

3. Tomb-Sweeping Day Qi is a solar term that reflects the dual factors of meteorology and traditional festivals among the 24 solar terms. From the meteorological point of view, the climate in Tomb-Sweeping Day is refreshing and warm, and most parts of China enter the typical spring ploughing season, and vegetation and trees begin to sprout, and farmers are busy with spring ploughing and sowing.