A book recording the words and deeds of Yan Ying, a statesman of Qi State in the Spring and Autumn Period. This book was written in the Warring States Period. Some people think that it was written by Dr. Qin, who was originally from Qi State. This book is compiled from historical materials and folklore. Among them, Yan Ying advised you not to covet pleasure, but to care about the people, appoint talents and listen to different opinions with an open mind, which is often adopted by later generations. Yan Ying himself abided by traditional etiquette and lived frugally, and was often praised by later rulers. Many vivid plot descriptions in the book show Yan Ying's cleverness and wit, which are widely circulated among the people. The book also analyzes the concepts of harmony and identity by summing up political experience. Yan Ying thinks it is not enough to echo the monarch; Only dare to make suggestions to the monarch and make up for its shortcomings, that is, harmony, is correct. This dialectical exposition also occupies a certain position in the history of China's philosophy. Yanzi Chunqiu was compiled by Liu Xiang, with 8 internal and external chapters and 2 15 chapters. There were seven or eight collators in the Qing Dynasty, and Su Yu annotated The Spring and Autumn Annals of Yan Zi and Zhang Chunyi annotated The Spring and Autumn Annals of Yan Zi in the late Qing Dynasty. Recently, there is Wu Zeyu's Collection of Notes on Yan Zi's Spring and Autumn Period, and there are also many research works and notes in Japan.