Other people's families built graves on my wasteland, and we didn't know it. Is this auspicious? Does this have any effect on my family?

This kind of behavior is illegal, because graves should be built in public places or places with useful provisions. If someone else's grave is built on your wasteland, it may have some influence on your family, such as destroying land use planning and affecting environmental sanitation.

Therefore, it is suggested that this matter be settled through consultation with the other party as soon as possible, and they are required to abide by the laws and regulations on land use. If no agreement can be reached, you can seek legal help to solve this problem.