cold-treat
Choose to ignore or ignore his unreasonable demands, wait for him to calm down and analyze the reasons for ignoring him, ask him not to do this next time, and clearly tell him that this is wrong and will not meet such unreasonable demands.
Conditional exchange
If the child has been crying, you can promise first, and then exchange the conditions that meet his requirements in the form of exchange, so that he can understand that he has to pay before he gains. But if he can't do it, tell him there will be serious consequences.
encourage
With reasonable encouragement, children will become more and more excellent and confident with the encouragement of their parents, and the relationship between parents and children will become better and better, and there will be more and more exchanges. He will no longer vent his emotions in the form of crying, which will also help him build a good character.