Heng Sao Tian Ya
y'all commenters above are clearly not chinese xD there is a chinese idiom where a man draws a dragon on a wall but does not draw in the eyes. this is because when he completes his drawings, they are so lifelike that they actually come to life. so you can guess what happens when the eye is dotted in: the dragon flies off the wall and disappears into the sky. and the author here is clearly alluding to that story.