Job Recruitment Website - Immigration policy - Excuse me, did many Han Chinese flow into the Korean peninsula in ancient China?

Excuse me, did many Han Chinese flow into the Korean peninsula in ancient China?

Quite a lot, there are nearly 40% O3 gene in haplogroup of Korean male Y-DNA gene, and O3 is the main body of China Han nationality, accounting for 50%~80% of China Han nationality.

According to historical records, the large-scale influx of Han Chinese into the Korean peninsula in ancient China was during the Warring States period and was driven away by war.