In Weeds, Lu Xun is "willing to be evaluated as a weed", because weeds have a very obvious feature, that is, they have tenacious vitality and have no requirements for the growth environment. Weeds can flourish even in barren land. In the era when Mr. Lu Xun lived, the social environment in old China was like a barren land, which was not suitable for the survival of the bottom people. Mr. Lu was willing to be a weed and put his thoughts into barren land, which opened the door to freedom and democracy for the poor in the old society.