Grandpa and grandson knock one for you, how to reply?

Grandpa and grandson knock one, don't reply a point. It's New Year's day in Northeast China. The younger generation will kowtow to their elders to pay New Year greetings. They are willing to tease their children to kowtow to their grandparents and other elders, and they will also get lucky money, which is to have fun during the Chinese New Year. Asking for money is not the purpose. When someone does something wrong, the other person apologizes and the other person is firm. When he is angry, he will ask each other in a provocative tone.