What is the meaning of the purple emblem star superstitious by ancient emperors?

Zixing is known as the master of fighting times. Ancient researchers regarded purple stars as emperor stars, and those who ordered palace stars to be purple were emperors. Purple MSI is Polaris, the main star of Ursa minor. Compare the sky to a funnel, and the purple star is the top of the funnel. Born at home is the head of the family, born in the country is the head of the family.