Now.....this is clever.

I always have great admiration for anyone who can draw, paint or otherwise make a picture of something that is at least recognisable. I can’t draw a stick man, although I would dearly love to be able to.

 From the way I read the article, the pictures are on the wall, and the visitor to the gallery stands in front of the picture as if they were in it. Very clever.

 I'm not sure how the visitor to the gallery gets into this picture.....maybe the girl is actually painted.

 You can see how this guy is not actually in the picture, but in front of it.

I found these pictures on the China Daily newspaper website.  I reckon this is clever.