When King Wu was seriously ill, what did Duke Zhou do to impress his predecessor?

When King Wu was seriously ill, the ministers were very worried. Taigong and Zhao Gong are going to Wangwen Temple for advice. Duke Zhou believed that only divination could not touch the first king. So the Duke of Zhou set up three altars, facing north, praying to the late king and wishing to serve him instead of the prince of Wu. After praying, the Duke of Zhou divined and got a good omen. It is said that King Wu's condition improved the next day. But soon, King Wu died. After the death of King Wu, Wang Cheng, who was only 13 years old, ascended the throne, and the Duke of Zhou assumed the heavy responsibility of stabilizing the world and consolidating the rule of the Zhou Dynasty as prime minister.