Calendar of adding soil to cemetery

Tomb-Sweeping Day visited the grave before 10 and after 10. Just add soil when you go. Forget the date. Some people say that soil should be added to the periphery and thickness should be added to the north. Yin Qi seems to be blocked. There are generally four solar terms (the lunar calendar) for going to the grave, namely Tomb-Sweeping Day, July 15th, the first day of October and the third day of New Year's Eve (in some places it is 30). These are traditional ghost festivals, that is, ghosts come out at the gate of hell every year, and other anniversaries and festivals are also to be visited!