The first sentence is connected with the second sentence to describe the geographical location. Qi is in the east, Qin in the west, Chu in the south, Zhao Yan in the north and Wei and Han in the middle.

475 to 22 1 year refers to 475 BC to 22 1 year, when Qin unified the six countries and the Warring States ended.

Lian Heng mainly refers to the political confrontation between the seven countries during the Warring States Period, sometimes the East-West alliance, and sometimes the weak alliance. There are two main forms: the six countries jointly confronted the Qin State and the Qin State Lian Heng sabotaged the alliance.