Moreover, in the traditional concept of China people, digging ancestral graves can only be done because of moral corruption, and it is not that the poor can't open the pot. There is no need for all countries to do such immoral things.
2. After the Qing Dynasty entered the customs, in order to facilitate the rule, or to have a proper name, its propaganda was that the Qing Dynasty entered the customs to help the Ming Dynasty eliminate Li Zicheng and other rebellions, and to help the Ming Dynasty avenge itself, thus establishing a stable rule relatively quickly.
In that case, it is naturally not good to dig the ancestral graves of the former dynasties. Even in order to show the same appearance, it is natural to send troops to protect it. Anyway, as long as it's not troubled times, there won't be a large-scale destructive grave robbery, and it won't cost much to send a few soldiers casually.
In addition, it should be said that when you become an emperor, you have to consider it after all. If you dig the ancestral grave of the former dynasty, will your grave be dug by the later generations? Therefore, orthodox dynasties rarely do this, except in a special period of troubled times, for the same reason as mentioned above. The income from grave robbery is not much relative to the total income of a country, which is not cost-effective.
The Ming Tombs are in the suburbs of Beijing. So far, a mausoleum has been dug up in the name of archaeology. After digging, it was found that the contents were easily weathered and not well preserved. So other tombs have not been opened as long as they have not been stolen. For example, the mausoleum of the First Qin Emperor has been staying well in Shaanxi.