The Sword God Prince Visited the Treasure Before

He was originally Xue Tianzhao, the thirteenth prince of the Feilong Kingdom, who studied martial arts with an expert. Three years later, there was a missing prince in the palace, and Xue Liuhen, the fastest sword in the world, broke through the fog of the world and found the treasure of the previous dynasty. The sword in white clothes moves through the clouds and flowing water, but it is said to leave no mark but no trace!