Can you sweep graves to worship your ancestors on the Double Ninth Festival?

Double Ninth Festival, the ninth day of the ninth lunar month, is called "Double Ninth Festival". People have the custom of climbing mountains on that day, so the Double Ninth Festival is also called "Mountaineering Festival". There are also sayings such as Double Ninth Festival, Cornus officinalis and Chrysanthemum Festival. Because the homonym of "99" on the ninth day of September is "long", it has a long-term meaning, so it is often necessary to worship ancestors and respect the elderly on this day. The Double Ninth Festival and the three festivals of "the first day", "the Qing Dynasty" and "Chongqing" are also the four major festivals for ancestor worship in Chinese traditional festivals. 20 12 February 28th 12 The law makes it clear that the ninth day of the ninth lunar month is the festival for the elderly.