Why can Koreans easily integrate into China? Is the Korean Peninsula a paradise for the ancients?

In fact, tracing back to the source, there is a Koguryo in Jilin Province, a minority regime, which is recorded in the history books of the Three Kingdoms. They have been living in Jilin province. In the early days of the People's Republic of China, their capital was Xinbin, Liaoning, and later in Ji 'an and Pyongyang. Are all surviving ethnic minorities. At the end of the Ming Dynasty, Koguryo perished, and some of its citizens entered the Central Plains, while others stayed in the same place.

There were indeed many Korean immigrants in the late Qing Dynasty. At that time, Shenyang, the three northeastern provinces, and Fengtian, Liaoning, were both capitals. Jilin province is forbidden, people can't enter it casually, because the origin of Jurchen is Changbai Mountain. At the end of the Qing Dynasty, many Korean immigrants crossed the Yalu River and reclaimed wasteland in Jilin, which gradually formed the present pattern.