If you stand in the west, the left is the south.
If you stand in the east, the left is the north.
Besides, the earth is round. What do you mean by left and right? They are all artificial. There is no need to think too much about this.
Some people say that the left is yang and the right is yin, so the man is on the left.
But the living is yang, the dead is yin, and they are all dead. .
It is only because of these pressures that you should be cautious, because it is a matter of life and death. That is, for the ancestors and for educating the next generation. This is called respect, gratitude and inheritance.