Wu Zetian asked someone to tell her fortune.

At that time, Yuan Tiangang saw that Wu Zetian was a female body, but she didn't disclose this because Wu Zetian was indeed the fate of Datang, which was inevitable. Therefore, instead of revealing the secret, it was better to let her develop herself, and perhaps there was hope to restore the prosperity of Datang. Of course, these contents are recorded in unofficial history, but it is another matter if they are not credible. For details, please refer to the 129th Biography of the New Tang Dynasty.

In the early years of Zhenguan, Yuan Tiangang worked near Zhongshu, when Wu Zetian's father Wu Shihuo served as governor. So Wu Shihuo invited Yuan Tiangang to his home. At the dinner table, Wu Shihuo wanted Yuan Tiangang to look at the faces of his three children. Yuan Tiangang readily agreed. After all, Yuan Tiangang is famous for divination. At first, Wu Shihuo just showed Yuan Tiangang the faces of his two sons, Yuan Qing and Shuang Yuan. They were just third-rate officials, so they could keep their status as heads of households.

Later, his wife Yang showed Yuan Tiangang Wu Zetian, who was still in infancy, but she was really startled by Yuan Tiangang. According to historical records: "Dragon pupil and phoenix neck, if female, is the son of heaven." It seems that Yuan Tiangang didn't see Wu Zetian's daughter from here, but in fact, from the perspective of other unofficial history, Yuan Tiangang just saw through it at that time.

According to records, in the sixth year of Zhenguan, Li (a master of metaphysics who is equally famous with Yuan Tiangang) also saw the fate of Wu Zetian and told her. At that time, Li Shimin intended to order the execution of Wu Zetian, but was stopped by Yuan Tiangang. He said to Li Shimin, "Wu Zetian is the doomed fate of the Tang Dynasty. Even if Wu Zetian is left as emperor, the Tang Dynasty may rise again in the future. But once Wu Zetian is executed, there will be more powerful figures in the future, and the Tang Dynasty will definitely be overthrown. " This shows that Yuan Tiangang recognized Wu Zetian as a woman at the first sight. The reason why he didn't say that he seemed to protect Wu Zetian was actually a better guardian of the Tang Dynasty.