Yuan Tiangang and Li were very powerful people in the early Tang Dynasty. They are all famous fortune tellers. I heard that you can not only watch Feng Shui, but also predict life and death to solve the future. The Cup Refusal was written by Yuan Tiangang and Li He. This book contains many things, and this deduction is also used to calculate the national luck, which is also very accurate. It's amazing.
When Emperor Taizong was traveling together, he met a group of red and black horses by the river. Emperor Taizong asked them to calculate that the horse went into the water first, and Li guessed it right. Later, Wu Zetian also wanted to test the ability of two people and let them choose a land of feng shui. Later, they discovered a treasure trove of geomantic omen together, which surprised Wu Zetian very much. After this test, their reputation is particularly good.
According to historical records, the location of Wu Zetian's coffin is a treasure house of their choice, which was arranged according to the requirements of Yuan Tiangang. Yuan Tiangang and Li Lao were apprentices together and became neighbors after their death. Two people happened to choose a place in Chang 'an County as a cemetery, but the distance between them was only 100 meter.