A French museum had to defer plans for an exhibit about Mongol emperor Genghis Khan because China demanded that the exhibit not use the words "Mongol", "Empire" or "Genghis Khan".

Now that China has started a long-term plan to assimilate Mongols that live in China, it apparently would like to make the rest of the world forget that Mongols are ethnically different from Han Chinese. That will be difficult to entirely accomplish, since the rest of the world is well aware of the Mongol empire. Russia and the Middle East were conquered by it and they remember.