忘年之交

Explanation: Generation is not quite the make of a friend. 　　Source: "Later Han Heng Chuan" value for the beginning of twenties, and financial forty years, then and as friends. "" Appreciative He Xun Biography "give the state scholar twenties, are reflected in its countermeasures Nango Yun Fan, large commensurate reward, because knot friendship between generations." 　　Examples: Chen Tai admiration, saying the public Liaodi as God, Shubing mention the consideration indeed! "So Chen Tai and Deng Ai became ~. ★ Ming Luo," Three Kingdoms "one hundred and eleventh Back Thesaurus:  friends in days of simple living, Bao Guan companion in adversity, sworn brothers and sisters companion in adversity, Absolute sincerity Centre at, close and intimate friend-ship, Stone pay