The cemetery belongs to a secluded house. It is said that a good crypt can bless future generations, which may be unknown to us. But now cremation is required. After cremation, people's material has been transformed, and the blood relationship with future generations no longer exists, so it is impossible to bless future generations. Therefore, the cemetery need not care too much about the quality of sand caves. At most, it is necessary to look at the chaotic head and wade in the water to reassure the living and the dead.
So now Feng Shui masters also pay attention to Yang Zhai, unless there is a private cemetery, then consider Yin Zhai.
I hope it helps you.