Maybe change the idea. The answer is not in the painting but in the wooden piece connected to the painting. The scroll is hollow and inside are some a metal parts. They click together to make a small dragon.
Then holding this dragon, the person has to stand somewhere and wait for the solar eclipse.
The kilin come and spit out the pearls. The pearls shine up the are and due to magnetism, the head of the dragon spins to the spot where the treasure is hidden.
But thr kilin guard it so you have to tame them. <IMG SRC="smilies/tongue.gif" border="0">