Which Chinese cultural traditions have been claimed as cultural heritage by other countries?

This question has some historical factors in it. South Korea used to be a protectorate and tributary state of China, along with the present North Korea and other countries on the Korean Peninsula, and in fact, the main source and foundation of their culture was the civilization and culture of China! They were absorbing and copying the ancient culture of China! So there are many cultures in their culture which are very similar to the traditional Chinese culture. And now China doesn't pay enough attention to and protect its traditional culture, so much so that it allows a copy to become an obstacle to the spread of Chinese traditional culture! What's worse is that other countries don't know and understand some of China's traditional cultures well enough to allow a replica to have a market, while the real culture maker - China - is ignored by others!