What's the point of kowtowing?

The customs and habits of kowtowing at funerals vary from place to place, and the focus of kowtowing is also different.

First, the old etiquette, kneeling on the ground with both hands, head down.

Second, the New Year ceremony in rural areas.

Third, it is a ceremony to bid farewell to elders and old people.

Fourth, in the farewell ceremony for elders and old people, kowtowing is the most exquisite, and the highest kowtowing ceremony among kowtowers is three knocks and nine obeisances.