Introduction to Long Xutan: After being trained by Mulan and the Eight-hole Immortal, the little white dragon changed its bad habits and became helpful. Once, when people were playing in the water in the Grand Canyon, a weathered stone on the mountain suddenly became loose. The bones rolled down from above, and were about to hit people on the head. It was too late, but soon, the little white dragon jumped up from the water and wrapped its beard around the falling rocks. Traces of the little white dragon's whiskers can also be found on the bluestone entangled with vines.