Correct

老中青

/ lǎo zhōng qīng / 
Strokes

Definition

old zhongqing

Example

As a Noun

the old, the middle-aged and the young

1
Lǎozhōngqīng
老中青
sānjiéhé
三结合

three-in-one combination of the old, the middle-aged and the young in the leadership