What is the way to be an official with a clean hand? Tomb-Sweeping Day is also called Youth Day.

1, remain uncorrupted for an official's life, and Tomb-Sweeping Day must make a solar term.

2, interpretation: for the official clean. -Qingming.

Qingming is the fifth of the 24 solar terms. Tomb-Sweeping Day is different from other solar terms in the twenty-four solar terms, that is, the traditional festival of ancestor worship in the twenty-four solar terms. Like the ancient poem "It rains one after another during the Qingming Festival, and pedestrians on the road want to die", they are all poems describing Tomb-Sweeping Day.

According to bucket handle's method of pointing to solar terms, bucket handle, the Big Dipper, points to Mountain B among the twenty-four mountains at the beginning of the night, indicating that he has entered Tomb-Sweeping Day.

5. Use the "constant air" method to determine when the sun reaches longitude 15.