Yan Zi (578 BC-500 BC), posthumous title Ping, was a famous politician, thinker and diplomat of Qi in the Spring and Autumn Period.
Yan Ying is the son of Wei Yan, a doctor of Qi State. In the 26th year of Qi (556 BC), he died of illness, and Yan Ying succeeded to the throne as a doctor. He has served as Qi, Zhuang Gong and other officials, assisting the court for more than 50 years. He is famous for his political foresight, diplomatic ability and simple style. Yan Ying is clever, witty and eloquent. Assisting in state affairs, he advised the King of Qi many times. He is flexible and principled, and he is not humiliated when he goes abroad, thus safeguarding the national dignity and prestige of Qi.