Did China people migrate to Japan, North Korea and South Korea in ancient times? Or a national branch? Did they fight in ancient times?

1, ethnic issues. The main body of the Japanese was formed locally. However, in history, some residents from China or North Korea did emigrate to Japan to escape the war. Are scattered, there is no large-scale immigration. As for Xu Fudong's claim that he founded Japan, it is only a legend and has no authoritative basis.

The composition of Koreans is complicated, and there are two sources. First, Korean aborigines originated in South Korea (now South Korea). During the Qin and Han dynasties, three countries were formed here, which were called "three Koreas" in history and had frequent exchanges with the Central Plains. But then Korea (now Korea) was China's territory. Later, there was chaos in China and the Central Plains, and powerful northern conference semifinals entered the Central Plains one after another, and the control of the Central Plains dynasty on the border areas also declined. Koguryo, a minority regime in northeast China, took the opportunity to rise south. However, the Koguryo rulers did not choose to enter the Central Plains for hegemony, but entered the Korean Peninsula, and basically controlled the area originally controlled by the central government of China. Three Koreas in the south of South Korea developed into two countries-Silla and Baekje, which is called the Three Kingdoms era of South Korea.

Later, three expeditions to Koguryo in the Sui Dynasty failed (in fact, the conquest of Koguryo in the Sui Dynasty should be a unified war at that time), and the Tang Dynasty was established. Emperor Taizong and Silla successively destroyed Baekje and Goguryeo, and established the Andong Capital Protection House. But at this time, a unified Korean nation has been formed, and the national consciousness of Koreans has gradually increased. In fact, it was difficult for the Tang Dynasty to maintain its rule in Korea, so the rulers of the Tang Dynasty gave up Korea, and Silla became the ruling regime that unified the Korean peninsula and became an ally of the Tang Dynasty.

2. The question of war. There are still many wars between China, South Korea and Japan, except for some mentioned above. Historically, the Central Plains region was relatively developed and rich, and the Central Plains dynasty generally did not have the idea of conquering Japan. The only central government in China's history that conquered Japan was the Yuan Empire, but it mainly used the Southern Song Dynasty to surrender its troops, and the fighting capacity was not strong, coupled with bad luck, so the two conquests failed.

Historically, Japan has been actively hoping to "land", that is, land on the Asian continent, and North Korea is the best springboard for them to land. Therefore, several foreign wars in Japanese history were all aggression against North Korea, and the purpose behind them was China. Japan invaded Korea three times. The first time was the battle of Baihekou in the Tang Dynasty. Japan and Baekje attempted to invade Silla, and Silla and Tang Dynasty defeated Japan with absolute superiority. The second time was Nonchen's Great Patriotic War in Korea. Ming sent troops to support Korea's anti-Japanese war. Finally, because Japanese leader Toyotomi Hideyoshi died of illness, Japan fell into civil strife and withdrew. The third time was 1894- 1895 Sino-Japanese Sino-Japanese War of 1895, when the Qing army was defeated, China completely lost its suzerain status to Korea, and Korea became a Japanese colony.