People call me stupid. Stupid is that I am too honest and easy to suffer. What should I do? I know that to be a man, to a certain extent, you can neither be too honest nor too treacherous.

This is indeed a distressing problem. Sometimes we are honest and have no talent. We didn't mean it, but we were really simple and didn't think so much. But there is no need to "learn bad" too deliberately. There is nothing wrong with honest people working hard and treating others sincerely. Just be careful not to be used by the bad guys, and observe and ponder more. With the increase of experience, you will make a lot of progress.