Traveling Through the Three Kingdoms, but I Only Know Psychology

Shen Yan traveled through time. The thesis was not handed in, and the tutor could not be found. When I opened my eyes, I saw the new field in the thirteenth year of Jian'an. Good news: Liu Bei is in town. Bad news: His people just took Shen Yan in as a spy. Other time travelers can make steel, make guns, and improve gunpowder, but Shen Yan can't do the same. He studies psychology - he understands why people are afraid, why they are gullible, and why they still jump in even though they know there is a pit ahead. Relying on this ability, he finally got a job under Liu Bei. But the further down you go, the worse things get. Why hasn't Xu Shu left yet? How far has Three Visits to the Thatched Cottage progressed? The Three Kingdoms in his mind were clearly made up of official history, novels, and complaints about videos, but every mistake he made in his memory could cost him his life. What's even more troublesome is that Zhuge Liang began to listen to him seriously. I made a mistake and need an explanation. You're right, more explanation is needed. Shen Yan originally just wanted to hold on to one thigh and live until the day he found a way to return home. Later, he discovered that those people who made him reluctant to let go were moving step by step towards the ending he remembered. He doesn't know how to build a gun, and he doesn't have a system. But this time, he wanted to try and let the person who should have lost win.