kāi​xiǎo​zào

extra coaching

开小灶 (開小灶) kāi​xiǎo​zào
extra coaching expression
to provide additional instruction or special attention to help someone catch up or excel, particularly in an academic context
preferential treatment expression
to grant special favors, privileges, or better conditions to an individual that are not available to others

Frequency

Movie subtitles
0.090 per million appears in 0% of films

Sources

Definitions
CC-CEDICT
Frequency data
SUBTLEX-CH