Lucy Yi Zhenmei was a Sichuanese Catholic saint from Mianyang, Sichuan Province, China. She is the lone woman of the five Guizhou Martyrs, a subset of the much larger Martyr Saints of China. She is referred to as Bienheureuse Lucie Y in old French sources.

Mianyang is the second largest prefecture-level city of Sichuan province in Southwestern China. Located in north-central Sichuan covering an area of 20,281 square kilometres (7,831 sq mi) consisting of Jiangyou, a county-level city, five counties, and three urban districts. Its total population was 4,868,243 people at the 2020 Chinese census, of whom 2,232,865 live in its built-up area made of three urban districts.