Why do Han people plant trees on graves when they die?

How many willows have grown on the graves of Han people? It was not planted on purpose. Most of them are grown by filial sons holding filial sticks at funerals.

Because filial sticks are mostly willow sticks, which are cut from willow trees. After burying the dead, they should be inserted into the grave. These willow branches are easy to survive after being inserted into the soil. If more people are buried slowly, the cemetery will become a forest.

As for some people who specialize in planting trees now, it is purely beautification. This is not a custom.