Which episode dreamed of Xue?

I dreamed of Xue in the first episode. When Li Shimin woke up, he talked about the dream. Ministers explained that a murderer was chasing him in the dream. There must be a rebellion somewhere. Xue was at large and jumped into Longkou, Shanxi. It is snowing in Longmen county, Shanxi province, and Xue, a teenager named Xue, is expensive. His name should be Gui Ren. Later, in order to pacify Korea, Su Wen turned against the Tang Dynasty. In fact, Xue was recruited from Longmen County in Shaanxi Province as the commander of the East. This is the story of the first episode.