Either words or expressions, formal ones or informal ones.
These are some idioms which may be an answer to the question:
眉清目秀 (mei qing mu xiu) This literally means: "(His/this Man's) eyebrows are clear and (His) eyes are beautiful."
玉树临风 (yu shu lin feng) This literally means: "(Men are/He is like a) grown jade tree which has faced the wind."
英姿挺拔 (ying zi ting ba) This literally means: "The handsome appearance (of Him/this Man) is outstanding."
帅气逼人 (shuai qi bi ren) This literally means: "The handsome attitude (of Him/this Man) is daunting."
Chinese idioms, usually, only consist of four characters. And all of the above given examples can be used to refer to a handsome man.
Be aware, though, that these are formal expressions, so, they are literary and are likely to be interpreted as being corny when used in an informal context.
This varies between places where Chinese is spoken. Also, since each of these places has many smaller, individual dialects, these examples may not always apply to each Chinese-spoken area.
An informal way to refer to a handsome man in any Chinese-spoken area is
"someone is/looks handsome?"
In Taiwanese Mandarin:
他(ta) 很(hen) 英俊(ying-jun)。 (click the sentence to hear it.)
In Taiwanese Min-nan: