After being struck by lightning, Emperor Wei gained the ability to read minds and saw through the disguises of the ministers and princes. He accidentally discovered that the ninth prince, Wei Yu, was different. Emperor Wei used his mind-reading skills to gain insight into the prince's intentions, promoted the eighth prince and Wei Yu, arranged for the opening of the palace, and secretly tested the fourth prince. The Xiqi envoy's offering of glass caused a commotion. Wei Yu was promoted to the position of glass maker by Emperor Wei, and after confessing to time travel, he went to the Ministry of Industry to perform his duties.
