I offered to leave my job, but my boss kept me there many times, saying it was a pity. It's a pity ... It's a pity that the company's salary can't go up again.

Helping others, that's all. The boss always thinks about cheap labor, regardless of your value. It is best to have the ability and low salary. The work can not only be done well, but also the cost is low. Why not? And when this kind of person wants to leave, he will also leave a sentence in his mouth. If they want to increase their salary and treatment, it seems to kill them. They'd rather you left, and he wouldn't add it to you. Secondly, it has a lot to do with your boss. He is afraid that you will help him share more, and he will stop you from achieving anything. It's impossible to think about it. He will leave you and take his job. Maybe he wants to keep you from the bottom of his heart, but the company's welfare is really bad. He is deeply sorry, but most people only keep you for his benefit. It will be much easier to keep him. After you leave, he will have to retrain and spend money. So don't care about his feelings! Good luck and find a better job!