Event/Time + 后
The word 后 (hòu) means 'after,' 'behind,' or 'later' and is used to indicate sequence in time or position. When placed after a time expression or event, it means 'after that event.' For example, 赛季后 means 'after the season.'
考试后我们一起去吃饭吧。
Kǎoshì hòu wǒmen yìqǐ qù chīfàn ba.
Let's go eat together after the exam.
毕业后她去了上海工作。
Bìyè hòu tā qù le Shànghǎi gōngzuò.
After graduating, she went to Shanghai to work.
下课后你有空吗?
Xiàkè hòu nǐ yǒu kòng ma?
Are you free after class?