Is this a man or a woman?

Look at the picture you sent, it should be a boy's, and the boy is not particularly old, almost 20 years old.

The biggest difference between boys and girls is the difference in figure. Relatively speaking, boys will be particularly tall and have large skeletons, and girls will be particularly petite and exquisite in many cases.

The boy in this picture you sent is not petite and has wide shoulders, so it is more likely that he is a boy.