Bìyè nà tiān, dàjiā bào zài yìqǐ kū le, kě tiānxià méiyǒu bú sàn de yánxí, zǒng yào gèbèn-qiánchéng.
On graduation day everyone hugged and cried, but all good things end, and each had to go their own way.
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usage
A consolation at partings: the end of a school year, a job, a trip together. It accepts the parting rather than mourning it. A shorter literary form is 天下无不散之筵席.