Church of the East in Sichuan

The exact date of the entry of the Syriac Church of the East (or "Nestorian Church") into modern-day Sichuan province is not clear, but probably occurred in the 7th century not long after the arrival of Alopen in the Tang capital Chang'an in 635. The provincial capital Chengdu is the only inland city in the southwest where a Christian presence can be confirmed in the time of the Tang dynasty (618–907).

Source: Wikipedia — Church of the East in Sichuan (CC BY-SA 4.0)