Heavens Will Descend The Dragon

Ao You, the ninth son of the Dragon King, is a gifted and intelligent man who has been admonished not to reveal his true form at will since he was a child. Later, when he accidentally showed his true form while drunk at the Queen Mother's banquet, he was found by the Heavenly Court to be a dragon, and was thrown down to the Heavenly Court with his immortal bones shaved off.
(Source: TMDb)