Abstract: “Han” (“韩”) as a title which indicate the Three Han ethnic groups, began in the period in which Zhenfan County was retreated in 1st century BC, and completed in 2nd century AD. The legend and the sacrifice about the Han King was a political narrative to construct the power. Meanwhile, the title of the Chen King which was controlled by the whole Ma Han means the domination on the Chen Han tribes. The name “Qin Han” of Chen Han reflected the reality that Han People migrate from the north peninsula. The title of “Qin” also indicated the authority of the Lelang County which was controlled by Yan and Qi people. The iron smelting industry in Chen Han was contributed by the immigrates from north peninsula. The development of Jinhai changed the situation both of Han and Wo in 3rd century. Han completed the ethnic construction and became stronger. Since then, DaiFang County was set to respond to the challenge of Han. Han as a unit was destroyed by Wei Dynasty, so the title of “Han” would never be a effective resource in the course of nation construction in 4th century’s south peninsula.