What is the real reason why Guan Yu looked down on Huang Zhong in Romance of the Three Kingdoms?

The first reason: Guan Yu looked down on Huang Zhong's birth.

In ancient times, ordinary people would attach importance to other people's family background, while Huang Zhong's family background was very low, so Guan Yu didn't like people like him from the beginning.

Secondly, Huang Zhong is an old general, so he should not accept any more rewards, but be modest or give these credits to others. Guan Yu, unlike Zhang Fei, likes to keep good relations with people at the top, but not with people at the bottom, while Guan Yu just likes soldiers at the bottom and doesn't like leading the work. He likes to give these to the lower classes.

Therefore, for Huang Zhong's reward, he felt that it should be given to his soldiers.

The second reason: Guan Yu was afraid that his younger brother Liu Bei would value others and no longer value himself.

Guan Yu loves face very much. He let Cao Cao go to Huarong Road because of the problem of face. Cao Cao gave him a gift before, and he must return it, otherwise he will be laughed at by the world.

Therefore, when the Five Tiger Generals were appointed, I didn't think that Huang Zhong would become a post-general. Guan Yu thought that he should be the second person with high status after Liu Bei, and of course he was second only to the strategist Zhuge Liang.

Guan Yu used Huang Zhong as a shield because of his own face.