白驹过隙

Explanation: Baiju: White Horse, an analogy the sun; gap: the gap. Like the little white ran in small gaps, like the former. Describe the time flies fast. 　　Usage: The main predicate; as object; analogy quickly time passes 　　Source: Qin Zhuang, "Chuang Tzu to know the North Tour": "Life between heaven and earth, if ever Baiju the gap, all of a sudden it." 　　Examples: ~, Sun and the moon shuttle, only see the end of May to open December, and as early as the weather back to the sun. (Minglan Ling Xiao Xiao Sheng, "Jin Ping Mei," the second time) Thesaurus:  the sun and the moon move back and forth like a shuttle-time flies, Douzhuanxingyi, Time Like Ran, Property transfer aberration, as summer goes and winter comes, Cold and warm Easy Day, Juguangguoxi, Juchuangdianshi, days went and month came, daily The following month go, from year to year, Things Past fleeting time, time flies, change of the seasons, passage of time, Douzhuancenheng, Hanwangshulai