to return to the same school and repeat a course from which one has already graduated, as a result of failing to get good enough results to progress to one's desired higher-level school
Definitions (Wiktionary)
verb, Mainland-China
to return to the same school and repeat a course from which one has already graduated, as a result of failing to get good enough results to progress to one's desired higher-level school
Definitions (兩岸三地生活差異詞語彙編—Two Shores Three Places)