This sentence came from a plot in the ancient martial arts novel " Eight Dragons ". An actor referred to an actor in the pugilistic world. Entering a painting referred to entering a painting for the rest of one's life. An actor's career might be drifting to the ends of the world, and it would be difficult to settle down. What this meant was that the profession of an actor was more wandering in the underworld, and it might be difficult for them to find a sense of belonging in their lifetime.