Peter Lieou was a Chinese Catholic layman and catechist who lived in Guizhou during the late 18th and early 19th centuries. After converting to Christianity, he dedicated his life to missionary work and teaching the faith. Despite facing exile to Mongolia in 1814 due to his religious activities, he returned to his homeland in 1827 to continue his ministry alongside Catholic missionaries. His commitment to preaching led to his eventual arrest during a period of renewed persecution in China.