Does anyone know what burial is? After the old man died, why did you put coins in the four corners under the coffin? I forgot how much I put in every corner. Any comments?

This is called "carrying money". Put one in each corner and one in each hand. In order to make the deceased not worry about money below, ancient copper coins with a square hole in the middle are usually put. It is best to use ancient copper coins. Otherwise, one-dollar coins can be used now, but it is superstition. There is also a saying that it is placed as the Big Dipper, which means to help the dead lead the way, but this should not be what you said.