Liu Qian passed through and became the son of King Wu. Yes, his original father was Liu Bi, the King of Wu who united many princes to rebel in history. He was finally defeated and fled, and died at the hands of the East Vietnamese.
Good news: The Seven Kingdoms War hasn't happened yet.
Bad news: The original person seems to have had trouble with the crown prince because of the chess incident.
Shu Yun: Prince Wu is a brash and arrogant man. He competes with the prince Bo, and is disrespectful. The Crown Prince takes advantage of the Bo situation and kills him. The king of Wu was angry and led the seven kings to rebel. They were defeated and Liu Bi's descendants stopped worshiping him.
Liu Xian: ... Is it still too late to remedy the situation?
Purpose: Strive for a better life