Explanation: Huangkou: children; children: children. Often used to ridicule other people young and foolish. Usage: Joint type; as object; to ridicule someone young and innocent Source: Tang Xu Xi "trick question cents concept Nanyue wall" Poetry: "Huang beginner line pediatric population, only what students know sun and the moon." Examples: Naturally, there are classical, the "~" do not know. (Lu Xun "canopy _set_ sequel to the ancient books and Vernacular")