HSK 4
Zhè shì yíxìliè yǒuqù de huódòng.
This is a series of interesting activities.
HSK 4
Tā xiě le yíxìliè guānyú Zhōngguó wénhuà de wénzhāng.
He wrote a series of articles about Chinese culture.
HSK 5
Zhège xìliè de chǎnpǐn hěn shòu huānyíng.
This product series is very popular.
