|p=Cáo Guìyīng
|w=Ts'ao2 Kuei4-ying1
|j= cou4 gwai3 jing1
}}
Agnes Tsao Kou Ying (28 April 1821 – 1 March 1856; also Agnes Kouying Tsao), or Cao Guiying (), was a Qing dynasty Chinese layperson who was martyred for preaching the Gospel in Guangxi. She was canonized a martyr-saint by Pope John Paul II on 1 October 2000.
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