Some tree species will almost die if they are soaked in water, because their thick bast sap will often seep from the wound and flow into the water because of soaking, and the stakes will die if they lack liquid, so these new stumps should be watered after planting sand for one week.
When the stump survives in the pot, it must be sprayed with water on the branches and leaves frequently and shaded properly. At this time, for example, some buds on the stump are not suitable, so peel them off and don't feel bad. See more sunshine in summer and trim and shape in autumn.
Looking at other people's bonsai is as simple as that. I didn't know there were so many things to pay attention to. Do you have so many stump bonsai at home? It's really good to keep them at home.