There were many occupations in ancient times. Ancient occupations can be divided into upper class, middle class and lower class, but there are different opinions. Beating a dog means that in the old society, a man with a wallet, a red sleeve head, a monkey and a puppy on his back was called a monkey dog to perform a show for a living.
Under the ninth stream, under the ninth stream: "First-class beating dogs, second-class selling oil, third-class pedicure, fourth-class shaving, fifth-class lifting food, sixth-class tailor, seventh-class excellent, eighth-class prostitute, ninth-class hand blower." Xiajiuliu is a lower-class figure and belongs to a class of people with low social status. This reflects an idea of despising manual labor very much.