The meaning of this couplet has been explained upstairs: water is nothing to worry about, because it is as calm as a mirror without a wrinkle, but when the wind blows, it sets off waves, just like wrinkles. This mountain has never been old, but because of the snow on the top, it looks as if its head is white! The personification way is a metaphor to change oneself for other external reasons.
The beauty of this couplet lies in the author's clever use of the similarity between water waves and people's "wrinkled faces"
and
The similarities between Snow White and Bald Head are very beautiful, vivid and creative. The two sentences reflect the author's worries and worries, which are very vivid.
The original text of this link should be: Qingshan is not old, it is a snow-white head; The green water is leisurely and the face is wrinkled by the wind.