What's the difference between Koreans and Koreans?

Today's Koreans are exactly Koreans, and Koreans are the aborigines of Korea (now North Korea and South Korea). Because South Korea wants to be reunified, now Koreans can apply for Korean nationality. But in fact, they are all Han people, and more than half of Korean people are of Han descent. When the Shang Dynasty perished, Ji Zi, a nobleman of the Shang Dynasty (a relative of Zhou Wang of the Shang Dynasty), led 5,000 people to flee to the Korean Peninsula and established the first country on the Korean Peninsula: Jizi Korea. Since then, China people have been emigrating to the Korean peninsula.

During the Han Dynasty, the Korean peninsula was occupied by the Han Dynasty, which established four counties there. During the Eastern Jin Dynasty, China lost its territory in the north, so it could not control the Korean Peninsula. There are many tribes on the Korean peninsula. These tribes annexed each other, and three countries, Silla, Baekje and Koguryo, were formed before the Sui Dynasty.

The Tang Dynasty and Silla Alliance eliminated Baekje and Koguryo. Baekje was destroyed by the Tang Dynasty, and later its territory belonged to Silla. Goguryeo was jointly destroyed by the Tang Dynasty and Silla, and its territory was divided by both sides, with Datong River (due south of Pyongyang) as the boundary, to the Tang Dynasty in the north and Silla in the south. Later, Silla declined, the Korean Peninsula split again, and the rising Korea unified the Korean Peninsula. Koreans are Silla people, and Silla people are descendants of Jizi Koreans. So Koreans are descendants of Huaxia-Han nationality by blood.