口口相传

Explanation: Vain literature, oral tradition. 　　Usage: The main predicate; as predicate; that spread or pass an oral 　　Source: Song Mai "Ten Huang Yi Jian Weng Chi C": "Ru is also the world five years, passed my language in the world, for good and the students into the world, by An Yuefu; return to the perpetrators of very undesirable by seamless suffering. ORDER Press This by word of mouth. " 　　Examples: Although he ruined ~ of romance. (Lu Xun "且介亭杂文 illness Zatan")