In the Tang dynasty many of the foreign merchants in Chang'an were Zoroastrians.
Tips
mistakes
祆 is written with the spirit radical 礻 and 天 "heaven". Don't confuse it with 袄 "jacket" (clothing radical and 夭) or 妖 "demon".
usage
祆教 is the old name, used since the Tang and still preferred for the religion's history in China; the modern name, transliterating Zoroaster, is 琐罗亚斯德教.
