Chinese astrology's most powerful systems :Zi Wei Dou Shu (Purple Star) and BaZi (Four Pillars) .they are locked behind Chinese software and machine translations. Imperial Astrology is a free web app: enter a birth date and get a full chart explained in plain English ,about 12-palace ZWDS chart, 107-star map, BaZi pillars, ten gods, luck cycles. No sign-up, no fortune-telling. Built by a practitioner of both systems, grounded in the classical canon (Zi Wei Dou Shu Quan Shu; Yuan Hai Zi Ping).