忘年交

Explanation: Generation production line that age differences in informal and make friends. With the year-end parties of the good. " 　　Source: "Appreciative He Xun Biography" Xun Zi Zhong Yan, eight years old can write poetry, twenties, held the state scholar. Fan clouds reflected in its countermeasures Nango, large commensurate reward, because knot friendship between generations. " 　　Examples: This morning, he was watching the sky, clouds, are really no thought to lie, when suddenly came face a ~. ★ Mao Dun, "the old squire"