This is the 6251st most frequent Chinese word.
後才
"後才" means "only then" or "not until after."
The phrase '後才' here emphasizes that the action can only happen after completing a prior condition.
只有完成作業後才可以玩遊戲。
You can only play games after finishing your homework.
The phrase '後才' indicates that the action of starting to study strictly occurs following the completion of lunch.
我吃午飯後才開始學習。
I start studying only after having lunch.
In this example, '後才' expresses that the blooming of flowers happens exclusively after a specific preceding event—springtime is reached.