Oops, one more point. Look at the bottom of this image, Ai Li -- you have left no room for those feet to move --the edge chops off the toes on one of the feet. Always scan the edges of your pictures as you shoot -- the more experience you get, the more this will become second nature.
Stu hits it on the head -- this image is an incongruous contrast of the empty and the full. However you could have made more of that contrast by not coming in as close, and leaving a bit of space around each of these doorways in their entirety. Two complete doorways, side by side, would have stressed this incongruity more expressively.