Is it a good idea to beat the dog?

If you don't fight, you can't teach. You should fight. Be careful not to hit the head when fighting, it is easy to get hurt. It's not a big problem to hit other places, and generally you won't get hurt. Dogs are usually honest and obedient after being beaten. At this time, you should praise them, pat them or reward them in time, so that dogs can learn to distinguish what to do and what not to do.