Why does the smile in Mona Lisa have eternal charm?

In the corners of the mouth and eyes full of personality, there is a quiet and elegant smile coming quietly, which sometimes makes people feel comfortable and gentle, sometimes makes people feel slightly sad, sometimes makes people feel very kind, and sometimes makes people feel a little reserved. Mona Lisa's "mysterious smile" is so intriguing and elusive. With his genius imagination and magic brush, leonardo da vinci made the Mona Lisa's fleeting facial expression a symbol of eternal beauty.

Dear, with your hands, hope to adopt!