Among the 56 ethnic groups in China, which one is the youngest? Is it Korean?

No, the youngest should be the Russians. Those Russians are the descendants of the Russians who settled down when Russia invaded the East. After the victory of the Anti-Japanese War, if China had not insisted on repatriating Japanese overseas Chinese, the millions of Japanese would have added another Japanese ethnic group to China. Maybe now there are tens of millions of them. How terrible.

Comments, the finally identified ethnic groups do not represent the latest ethnic groups. They have been in China for generations, but they have not been separately recognized as an ethnic group by the government. Russia and North Korea both have immigrants from abroad.