Event/Time + 之后, Clause
之后 means "after" and is placed after a time expression, event, or action to indicate what follows. It functions as a more formal alternative to 以后 and is common in both written and spoken Chinese. For example, 毕业之后 means "after graduating."
毕业之后,他去了一家外企工作。
bìyè zhī hòu, tā qù le yī jiā wàiqǐ gōngzuò.
After graduating, he went to work at a foreign company.
吃完饭之后,我们去散散步吧。
chī wán fàn zhī hòu, wǒmen qù sànsànbù ba.
After we finish eating, let's go for a walk.
手术之后,她恢复得很快。
shǒushù zhī hòu, tā huīfù de hěn kuài.
After the surgery, she recovered very quickly.