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.
- 帥氣 (shuai qi)
- 英俊 (ying jun)
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.
In Taiwan you could say:
- 美型男 (mei xing nan)
- 潮男 (chao nan)
In China you could say:
- 高富帅 (gao fu shuai)
In Hong Kong you could say:
- 靚仔 (liang zai)
An informal way to refer to a handsome man in any Chinese-spoken area is
男神 (nan shen), which is a common fashion word among younger people. It's especially popular with young "girly girls" who would like to think of a handsome guy as their "prince". Literally it's translated as "man God" and its English equivalent would be Adonis.