What is the revelation of the hotel bulldog?

This fable tells us that even the best "wine" will turn sour if the "fierce dog" is not killed. It is a national disaster to rape a villain like a fierce dog. Wise leaders should pay attention to "judgment and choice", get close to the sage and stay away from the villain, so as to seek advantages and avoid disadvantages. Only by proceeding from the overall situation, examining the sages, and identifying the loyalists and traitors, can leaders have a good eye for people and do a good job.