A bear
This one is already quite well-known around the entire world because of how silly and over-the-top it is. Chinese President Xi Jinping had been compared to the fictional bear Winnie the Pooh so many times it became a serious problem. Hence the crackdown on the honey-loving bear was put in place by the government.
They made it illegal to mention or spread images of the bear anywhere in China to preserve the president’s image. You can not find Winnie the Pooh anywhere on the Chinese internet, the cartoon character has essentially been erased from history in their eyes. Make sure you do not pack your Winnie the Pooh t-shirt with you when you visit.