* The Korean peninsula was NOT colonized by the Chinese Han. While there were periods of significant Chinese influence, Korea was never a colony of the Han dynasty or any later Chinese dynasty.
* The Three Kingdoms of Korea (Goguryeo, Baekje, Silla) existed before any significant Chinese influence. These kingdoms arose in the 1st century CE, long before the Han dynasty had any power in the region.
* Silla eventually unified Korea in the 7th century. This was a result of internal Korean power struggles, not Chinese intervention.
* The Goryeo and Joseon dynasties were later kingdoms, also originating from within Korea. These were not a direct result of Han influence, though there were periods of cultural and political interaction.
Therefore, there is no "main kingdom" of Korea that could be attributed to direct colonization by the Chinese Han.
It's crucial to avoid simplistic narratives about historical relationships. While China and Korea have a complex history, including periods of interaction, it's important to avoid generalizations like colonization.