What nationalities were North Korea and South Korea originally? Are they Daiwa Group?

The oldest inhabitants of the Korean peninsula are the people who pee. After the Yin adherents and the Yi people moved into this area, the Korean Peninsula experienced the first great ethnic integration, and formed such ethnic groups as, Sanhan and Lanai. Since the end of the Western Han Dynasty, the Han nationality and Fuxi nationality have moved in one after another, which has led to the second great ethnic integration on the Korean Peninsula, and the northern part of the Korean Peninsula has shown an obvious tendency of sinicization. After the establishment of Koguryo, Silla and Baekje, their countries all went through a complicated process of national integration and formed three different nationalities. After Wang Gaoli unified the Korean Peninsula, the third great ethnic integration was formed, which integrated all ethnic groups in Koguryo, Silla and Baekje, forming a single ethnic Korean on the Korean Peninsula today.