Why did Shi say it was a purple star?

Because of his profound accomplishments in the field of Wei Zi's math. We can predict people's fate and future through numerology calculation.

It is understood that Shi, as a senior expert in the door industry, has been asked. It has a high reputation and influence in this field. That's why I called ziweixing down to earth.

Wei Zi's fortune-telling is an ancient divination. Legend has it that it originated in the Han Dynasty. It mainly analyzes and calculates the information of people's birth time, place and gender. So as to get a person's fortune and future development trend.