Pe̍h-ōe-jī, sometimes known as Church Romanization, is an orthography used to write variants of Hokkien Southern Min, particularly Taiwanese and Amoy Hokkien, and it is widely employed as one of the writing systems for Southern Min. During its peak, it had hundreds of thousands of readers.

Hokkien is a variety of the Southern Min languages, native to and originating from the Minnan region, in the southeastern part of Fujian in southeastern mainland China. It is also referred to as Quanzhang, from the first characters of the urban centers of Quanzhou and Zhangzhou.