The boss is very stingy and pretends that he doesn't know that he will get a raise. How can I ask the boss for a raise?

It is suggested to say this directly, for example, "Manager XX, you promised me a raise in October last year, but the salary paid by the finance department has not been added". Generally speaking, the boss will think about it and really promised to give you a raise before. At this time, there are two possibilities, one will say that he forgot, and inform the finance immediately. Another possibility is that the boss will say, "The company's business situation is not good recently. Please see if you can postpone your salary increase, and please understand." In that case, if it's the first possibility, it's a little late, but it's basically fulfilled. If it's the second possibility, it's suggested to compromise a little. Others are bosses, and it's no good forcing you to do what you don't want to do. It may be that the company's business situation is really bad, or it may be an excuse. In short, it just doesn't want to give you a raise, or even if it is raised, it is not willing.

So you should have the courage to bring this up first. No boss treats employees like anything just because they ask for a raise. At most, you mentioned it, and it turned out to be the second one above. If this is the result, then you will know who your boss is. You have to decide for yourself whether to leave or stay. If you go, you can ride a donkey to find a horse, learn a lesson, talk to the new boss about the treatment, and then leave here and leave.