Tomb-Sweeping Day is one of the important traditional festivals in China. It is not only a festival for people to pay homage to their ancestors and cherish the memory of martyrs, but also a link for the Chinese nation to recognize their ancestors and return to their ancestors. More importantly, it is a link to know their ancestors. Look at your own shortcomings, correct yourself, and drive future generations. Realize the value of life, remove the dead leaves left by our ancestors, keep the new buds that can be used for reference, and promote positive energy. From generation to generation, the clear revision date is April 4-6 of the solar calendar every year.