What are the damaged world heritages in China?

Many of them are damaged to varying degrees. For example, some sections of the Great Wall are flooded by tourists, and plastic bags, mineral water bottles, waste paper, peels and coke cans can be seen everywhere. Others are more serious. The city wall was scribbled by tourists, and in some places there were advertising papers stuck on it. The local villagers are even more hateful. They "rely on the mountain to eat the mountain", build ladders privately at the mouth of the Great Wall and the path leading to the Great Wall, and set some fees. That is, people borrow his ladder or climb the Great Wall with it. When the enemy comes, the ladder will break if it is not taken away. ) Some real estate developers have built many buildings in the Great Wall Reserve that are not in harmony with the Great Wall. He refused to listen when he was advised not to do so. Accelerated the destruction of the natural environment around the Great Wall.