From Father to Prime Minister

Wealthy businessman Gongsun Jie accidentally travels to ancient times and becomes the Prime Minister of Zhao. To save his country, he buys grain at a high price but is framed by the traitor Guo Kai and dismissed by the foolish King Zhaoqian. Remembering his past kindness, King Ying Zheng of Qin invites him to Qin with six cities as a gift. Gongsun Jie is appointed Left Prime Minister and Grand Tutor. Using his advanced knowledge, he promotes papermaking, improves weapons, and promotes agriculture, greatly strengthening Qin. He later uses a counter-intelligence tactic to sow discord between King Zhaoqian and Li Mu, secretly saves Li Mu, and brings him to Qin. Finally, Gongsun Jie leads the Qin army to the gates of Handan, refuses Zhao's peace offer, and demands King Zhaoqian kneel and surrender, both avenging his past grievances and helping Qin begin its hegemony over the six states.