A vain effort, a meaningless action

It is said that after Jigong became a beggar from a wealthy family, he lived on the streets. Got him a big bag. But a big dog happened to see it and chased him to bite him, so he took the bun and threw it away. The dog stopped chasing him while holding the bun in his mouth. It can be said that the meat buns and the big dogs will never come back!

So, the meat buns beat the dogs, and they will never come back. It means that the meat buns will never come back.