illustrated by Mercer Mayer 1976
One of my favorite Mercer Mayer books. The city of Wu has been warned of a coming attack by the wild horseman of the north. The Mandarin lord decides to pray for help from the Great Cloud Dragon. But when the Cloud Dragon appears as a fat old man no one believes that he could be a dragon except for the small gatekeeper boy, Han. Because of him, the city is saved and he is rewarded. And best of all, now everyone knows what a Dragon looks like.