How did Cao Wei's Wei word come from the Three Kingdoms?

The word Wei originally refers to the balcony on the ancient palace gate: Wei que (a towering balcony built on the ancient palace gate, also used to refer to the imperial court because there are places hanging laws on the lower sides). (This is the way Wei Xiang County manages elephants. -"Zhou Li Taizai"

From then on, it became a surname: Wei's ancestor was Bi Wan, the descendant of Bi. Bi Gaogong is the 15th son of Zhou Wenwang, and his surname is because he sealed the country with Bi Di. Bi Guo died in Xirong at the end of the Western Zhou Dynasty, and later became a civilian. Bi Wan is a descendant of Bi. He defected to Jin Xiangong in the early Spring and Autumn Period, was taken seriously, and was promoted to be a doctor. In 66 BC1year, Bi Wan was ordered to destroy Wei, whose surname was Ji, and Wei was named Bi Wan. According to the Records of the Wei Family, Bi Wan, a doctor of the State of Jin, was named Wei for his exploits, and divination was made for him: "After Bi Wan, he will be great." Ten thousand, full number also; Wei, so is your name. So the reward is the beginning, and the sky is open. The emperor said trillion people, and the princes said ten thousand people. Today's life is big and must be enriched. " It means that it is auspicious for Bi to own the land of Wei. "Wan" is the number of feet, and "Wei" and "Wei" have the meaning of being tall and majestic, so it is in line with God's will to receive this honor. The son of heaven has trillions of people, and the princes govern the people. With the blessing of Biwan, it will be more and more prosperous. That's how Wei's surname came from.

Since then, "Wei" has become the name of an ancient country. Wei in the Spring and Autumn Period and the Warring States Period.

From then on, Emperor Xian of Han Dynasty named Cao Cao "Wang Wei", which became the origin of Cao Wei.