Is it illegal to dig ancestral graves?

Some descendants will be reburied after their ancestors are buried in order to give them a better place for geomantic omen. So is it illegal to dig their ancestral graves?

In one case, two brothers dug up their great-grandfather's grave and took out 32 funerary objects. As a result, they were arrested. Later, the two brothers applied to retrieve the funerary objects, but the Cultural Relics Bureau refused this request and later took the Public Security Bureau and the Cultural Relics Bureau to court.

However, according to the law, all the cultural relics left in People's Republic of China (PRC)'s underground, internal waters and territorial waters belong to the state. So I refused the request of the two brothers.

The two brothers refused to accept it, and the characters belonged to his great-grandfather, not the bones, so they should belong to future generations. However, because the funerary objects involve antiquities, they are all owned by the state. Therefore, funerary objects and graves are owned by the state. If you dig a grave, as long as it is buried in the soil, it does not belong to you. No matter what the starting point is, it is illegal and may even be suspected of insulting the body. Besides, whose ancestors are willing to be dug up by future generations is a big unfilial thing, so let them be buried.