How to understand "a hero, treat each other with sincerity"

Use the word "treat others bravely" to describe the heroes in the world. To be honest with others, heroes are aboveboard, selfless and impartial. He has something to say, just say it, without putting on airs, and everything is hidden in his insides, so as a character, he is clear.

When the other person is in danger, you can lay down your life for him. If you care about the use of liver and gallbladder, don't hesitate to contribute yourself.

Therefore, according to the word means to take care of and act on some places.

Explain that Li Dazhao does not repay kindness, but helps others with his own strength when others are in trouble.

Extension:

My understanding is that we often use the word "be honest with others" to describe heroes in the world. To be honest with others is to be honest with your servant. Heroes are aboveboard, so they have no personal interests.