Bìyè èrshí nián hòu, tā huídào mǔxiào cānjiā xiàoqìng.
Twenty years after graduating, he returned to his alma mater for the anniversary celebration.
Tips
memory
母 means 'mother', your alma mater is your 'mother school', the school that nurtured you. The same metaphor exists in English: 'alma mater' is Latin for 'nourishing mother'.
