Traveling Through the Three Kingdoms, I Became Liu Bei's Chief Military Advisor

What kind of waves would a character who traveled back to the Three Kingdoms period two thousand years ago create, and what kind of life would he create? Let's look at Tan Qian, a tiny figure who rose from the dust. After unremitting efforts, he left his own legend in this ever-changing history. It is not a rigorous historical article, but more of a fantasy. Shuhan Group, personal perspective.