Why can Yuan Shoucheng figure out that King Jinghe was beheaded?

Yuan Shoucheng's real identity is "Commissioner of Heaven", and he is a fairy of heaven.

Yuan Shoucheng can know the jade emperor's orders because Yuan Shoucheng is a fairy who performs the tasks assigned by the jade emperor. Heaven and earth discuss Buddhist scriptures and arrange Buddhist personnel. The Monkey King, Pig and Friar Sand didn't kill them, but kept them for the scriptures. Everything is ready for the reincarnation of the golden cicada in the west, except a fuse that triggers the event.

This fuse was lit by Li Shimin. In order to convince Li Shimin that only Mahayana Buddhist scriptures can save his people, he must see the difference between heaven and earth with his own eyes. So Yuan Shoucheng was sent to the lower bound. They took advantage of the gambling character of the king of Jinghe River and performed a play, which led to a series of plots such as fortune telling, gambling and dragon cutting.

Related content explanation:

Yuan Tiangang was a metaphysician, astronomer and Taoist in the late Sui and early Tang Dynasties. He has written many books about physiognomy, astronomical phenomena and geomantic omen, including Nine-day Xuan Nv Six-person Class, Five Elements Physiognomy, Yi Yao, Three Dynasties Physiognomy, Yuan Tiangang Gu Fu, and Anti-image Map of Taibai Games.

But most of them are dead and out of sight. He was ordered by Emperor Taizong to co-write with his disciples to discuss the historical trend. Perhaps the original name of TuiBeiTu is TuiTu of Bai Hui, Zhao Yuntong and Dai Ji.