玄菟郡
Chinese people were also in Gorguyeo. Book 28 of Samguk Sagi stated that a lot of Chinese migrated to Haedong since the chaos of Qin and Han. Later Han dynasty established the Four Commanderies, and in 12 AD Goguryeo made its first attempt to annex Xuantu Commandery. The population of Xuantu Commandery was about 221,845 and they lived in three counties (Goguryeo, Shangyintai and Xigaima) of Xuantu Commandery in 2 AD. Later on, Goguryeo gradually annexed all the Four Commanderies of Han during its expansion.