An 8th century Tang dynasty Chinese clay figurine of a Sogdian man wearing a distinctive cap and face veil, possibly a camel rider or even a Zoroastrian priest engaging in a ritual at a fire temple, since face veils were used to avoid contaminating the holy fire with breath or saliva; Museum of Oriental Art (Turin), Italy.[75]

https://en.wikipedia.org/wiki/File:Dinastia_tang,_shanxi,_straniero_dal_volto_velato,_600-750_ca.JPG

https://en.wikipedia.org/wiki/Zoroastrianism

Face veils to block saliva in Zoroastrianism hundreds of years before COVID 19 face masks