What are the fortune-telling methods in Qing Dynasty?

What did Kangxi say to his daughter-in-law and then decisively passed it on to Yongzheng?

Kangxi divined for his daughter-in-law, and the fortune teller said, "Enjoy all the blessings on earth and live a long and prosperous life", and then decisively passed it on to Yongzheng. The daughter-in-law whom Kangxi treated was Niu Kelu. Kangxi felt that Li Hong's physical quality was guaranteed because of her vigorous figure, rich face and good health, and the fortune teller also said so, so he felt that Li Hong had the essence of great events, so he decisively passed it on to Yongzheng.

Emperor Kangxi's wisdom is extraordinary. He is in a dilemma among many sons, because these sons are all excellent, and it is difficult for him to choose at the moment. Emperor Kangxi chose to visit his grandson, so Li Hong, the son of Yongzheng, came into his sight. Emperor Kangxi made a very important observation on his grandson. Facing the shrewd Li Hong, Kangxi didn't quickly decide who to give up the throne to, but one day he suddenly summoned Niu Kelu, Li Hong's mother. When Emperor Kangxi saw Niu Kelu, he felt that he was not an ordinary person.

It is said that Niu Kelu's natural figure and plump face represent her good physical quality. From this, Kangxi can infer that the health of her son Li Hong is guaranteed. Emperor Kangxi was born with smallpox, so he was very concerned about the health of his successor. However, Emperor Kangxi still felt uneasy and asked people to tell Niu Kelu's fortune. As a result, the fortune teller only said seven words: enjoy the "happiness, wealth and life" on earth. This fortune-telling method made Emperor Kangxi more convinced that Li Hong was the future emperor of the Qing Dynasty. Emperor Kangxi passed the throne to Yong Zhengdi. Facts have proved that Kangxi was right. Yongzheng decided to pass the throne to Li Hong in his lifetime, which led to the prosperity of the Qing Dynasty for more than 60 years.

Emperor Kangxi's method of choosing the emperor can be said to be very wise, which also laid the foundation for the long-term Qing Dynasty.