One of the Ziweidou stars.

When the year, month, and day of the birthday of the lunar calendar are added, the sum of the numbers is divided by the year number of the year. If the sum of the first five numbers of the resulting data is an odd number, it means that the birth chart is pointing to the back star.

According to the ancient "Gui Zang Yi", if you want to resolve the bad luck of the finger-back star and get good luck, you need to carve the Yingyang Formation and the Dove Candle Formation on the Purple Ice Silver Seal Talisman.