Don't bully the poor young man. The whole poem is that it is better to bully white beard than to bully poor young people. One day, the dragon will wear a phoenix. I don't believe my pants will wear holes. The meaning of the poem is that it is better to look down on the poor young people than the old people who have no money, because the future of young people is limitless. If young people work hard, they will make a fortune sooner or later, so they don't believe that they will wear pants with holes all their lives.
Don't bully the young and poor, which is a popular dialect poem in Cantonese, has no specific poet. White beard is a white-headed old man, and the dragon wears the phoenix, which means the apprentice. I don't believe in Cantonese. Hole means hole in Cantonese. A hole in it means there is a hole in something.