大有伪青年
[dà yŏu wĕi qīng nián]
Translating as 'Great Feigned Youthfulness', this may suggest the user presents as much younger than they are or pretends to maintain youthful characteristics; alternatively, it might also refer to an attitude or identity where one outwardly projects youth and freshness, though 'pseudo-youth' or 'fake young at heart' might carry negative connotations outside its cultural setting.