After the death of Qin, Xiang Yu became the overlord of Western Chu, enfeoffed many princes and enfeoffed the hometown of Qi into Qi, Jiaodong and Jibei. Qi Guoli Tian is the king of Qi, and they are all in Linzi; Move the King of Qi to Tiancheng as the King of Jiaodong, both of whom are Jimo; Sun Tianan, the founding king, was appointed as the king of Jibei and the capital of Bohai. Later, Tian Rong became king and merged with Sanqi.
After Han Xin pacified Qi, he was named King of Qi. "Three Qi" refers to the three kingdoms that Xiang Yu enfeoffed in the ancient land of Qi during the Warring States Period. "King of the Three Qi Dynasties" probably means that Han Xin was the actual ruler of the hometown of Qi during the Warring States Period.
Sanqin: After the demise of the Qin Dynasty, Xiang Yu divided the land in the Guanzhong area of Qin State into three generals of the Qin Dynasty. Zhang Han was named King Yong, ruling the western part of Guanzhong. Established Sima Xin as the king of the fortress and ruled the eastern part of Guanzhong; Dong Ming was named King Zhai and ruled Shang Jun, so he was called "Sanqin".