Why did Guan Gong blush?

According to Shanxi people, Guan Gong was originally a white face.

Later, everyone knew the story of "Being in Han".

Guan Gong left his two sisters-in-law in Cao Ying, and he didn't go to bed until her sister-in-law slept every night.

Sister-in-law was lying in the back room, distressed by her second uncle, and called out "Uncle, go to sleep quickly".

Guan Gong knew that his sister-in-law was not asleep, so he couldn't leave. He studied at his desk and turned left until late at night, day after day.

When a man and two women are alone in one room, Guan Yu will inevitably be moved. But he is a loyal man and would never do anything wrong to his eldest brother, so he held back. It was not until I returned to Han Ying that my face turned red.

Of course, this is just a legend. Probably used to prove Guan Gong's loyalty to the liver and righteousness.