Explanation: Not the door step. Refers to the closed-door automorphic. Source: Mao Dun's "Midnight" one of his twenty years is not enough to simply glimpse of households, the tomb of the letter life! "
With the "leaving home"
With the "leaving home." Mao Dun's "Midnight" one: "He was 20 years less than non-family life is just a glimpse of the tomb of the letter is living!"