Let You Contract with a Famous Historical General, and You Contract with Pangu?

Xu Yang, who accidentally traveled to Blue Star, summoned Lingling General Xing Daorong, Peerless General Pan Feng and the Great God Pangu. There have been historical gaps here, and a lot of knowledge is missing. Everyone thinks that Pan Feng is the most powerful general in the Three Kingdoms, and Pangu is just a rubbish nobody. They all want Xu Yang to contract with Pan Feng. Xu Yang knew that Pangu was the real boss, so he made a contract with Pangu. So everyone was angry. Think Xu Yang is destroying his future. The principal wants to expel Xu Yang, the school beauty girlfriend wants to break up with Xu Yang, and the surrounding students are even mocking Xu Yang. However, when Xu Yang tested the level, the SSR level that appeared on it blinded everyone. SSR is a more powerful existence than SSS! ... Many years later, when Xu Yang was holding the sky-opening ax and splitting a world open with one stroke, he calmly said: "Pangu, invincible!"