What is the relationship between the name of the Forbidden City and Ziweixing?

The word "purple" refers to the purple star wall, which is called the emperor. Because there are three walls among the stars in the sky, the Purple Forbidden Wall is in the middle, and the Qiu Wall and the Shi Tian Wall are on both sides. In ancient times, people thought that the emperor should live in the Heavenly Palace, which was also called Wei Zi Palace. The emperor on earth calls himself the son of heaven. "The emperor of peace sits in the middle, and the cautious officials are divided into four parts." Therefore, Wei Zixing Garden is called the emperor, and it is also called the Forbidden City because the inner city where the emperor lives is forbidden to the Lebanese people.