Because Yuan Tiangang only said half of what he said. Although these three people are all qualified to be high-ranking officials, all three of them have failed official careers and their futures are very slim, so they sigh. These three people were Du Yan, Wang Gui and Wei Ting. Yuan Tiangang knew that their official careers would not be smooth sailing, and calculated that they would all be demoted in the future. Sure enough, although these three people all achieved great achievements in the officialdom in the future, their official careers were quite bumpy.
Yuan Tiangang was a very famous metaphysician and Taoist priest in the late Sui and early Tang Dynasties. He was proficient in physiognomy and the five elements, and his calculations were very good and accurate. It is said that the location of the tomb of the famous ancient empress Wu Zetian was calculated by Yuan Tiangang based on Feng Shui. Later, many emperors' tombs were discovered and stolen, but Wu Zetian's tomb was not discovered, which shows the power of Yuan Tiangang. For such a capable person, there must be many people who want to ask him for fortune telling, but Yuan Tiangang is not greedy for money and power, so if you want to see him, you can't just rely on money, it can only depend on your luck.
After Yuan Tiangang saw the faces of Du Yan, Wang Gui and Wei Ting, he believed that they would all be able to become high-ranking officials in the future, but their career would not be smooth sailing. This is indeed the case. In the later period, all three of them were demoted to Xizhou because of what Yang Wen did. After Wei Ting was demoted, and after the Xuanwu Gate Incident, because he had a good relationship with Li Jiancheng, Li Longji hired Wei Ting as the chief doctor of the Ministry of Civil Affairs.
After Du Yan surrendered to the Tang Dynasty, he was requisitioned by Emperor Taizong of the Tang Dynasty. However, he was involved in the Yang Wen incident, so he was also exiled to Xizhou. After the establishment of the Tang Dynasty, Wang Gui became Li Jiancheng's confidant, and was later exiled to Yizhou due to the Yang Wen incident. All in all, Yuan Tiangang's calculation was accurate at that time. Although these three people were all high-ranking officials, their official careers were indeed very unsatisfactory.