Du Yu is the son-in-law of Sima Yi. After the establishment of the Western Jin Dynasty, he served as Henan Yin, later worshipped Zhennan General, and served as the military commander of Jingzhou and Xiangyang Town. In order to pacify Sun Wu's regime and complete the great cause of reunification, he was named Dangyang Hou. Many strategies have clearly defined the ways to revitalize and abolish, which people call "solo dance library"
Du Yu is well-read, knowledgeable and enthusiastic about Confucian classics. He claims to be a fan of Zuo Zhuan. He called "ram" sophistry. "It is not as the ancients said that Zuo did not learn the meaning of Tyumen, but spread in two directions. He was dissatisfied with the Confucian annotation and thought that Zuo Qiuming's will could not be studied deeply. Zheng Xuan, Fu Qian, Ma Rong, Jia Kui, Zheng Zhong. Most of them pay attention to the comparative study of the three biographies of Spring and Autumn Annals, and interpret Zuo Zhuan with the meaning of Ram and Hub Liang, which was criticized by Du Yu as "spreading chaos with two events". Zuo Zhuan was originally an independent book, which was different from the question-and-answer style of Yang Gongzhuan and Gu Liangzhuan. Du Yu specially selected Zuo Zhuan to explain Confucius' Spring and Autumn Annals, referring to many schools, and wrote a collection of Zuo Zhuan's Spring and Autumn Annals, also called Example Interpretation and Association Diagram. "The Long Calendar of the Spring and Autumn Period", prepared for the study of a family, became old "("Pei Zhu San Guo Zhi Wei Zhi Du Ji ").
The characteristic of Du Yu's Ji Jie Biography of Zuo's Family in the Spring and Autumn Period lies in his interpretation of Chunqiu with Zuo's Biography. From the Western Han Dynasty to the early Western Jin Dynasty, Zuo Zhuan has been circulated independently, and it is two independent books with Chunqiu. Du compiled Jing and Zhuan to interpret Jing, so it was called Jing Zhuan. This is also flawed. Zuo Chunqiu was originally a historical book, not a biography specially written to explain the meaning of Chunqiu. It seems that they don't want to combine them into one, and even the two books have different chronologies, so it is difficult to integrate them. In terms of exegetical knowledge, Dolby is not as good as the ancient Chinese classics scholar in Han Dynasty. Therefore, scholars in Qing Dynasty criticized Du Yu's works for neglecting exegesis, misinterpreting laws and regulations, not knowing ancient calendars, and reading literature to create ideas. Nevertheless, Du Yu's works were still excellent in the Jin and Southern and Northern Dynasties. As for the scholars in Qing Dynasty accusing Du Yu of tampering with the classics, he added fifty "ordinary examples" in Zuo Zhuan, which is a speculative word. As a matter of fact, as early as the end of the Warring States Period, Zuo's Spring and Autumn Annals had been added as a "routine" by the interpreter.
In the early years of the Eastern Jin Dynasty, Zuo Zhuan, written by Du Zhuyu and Fu Qian, was tied with academic officials, each with a doctor. During the Northern and Southern Dynasties, scholars who studied Du Fu's annotations and service annotations in the south often exposed each other's shortcomings. Some praised Du Fu and praised him, while others wrote Shen Du's Difficult Service to answer. Because it came out late and changed from ancient times, it can cater to the wind of Jiang Zuo's worship of the new, so it is slightly richer than Fu Zhuan. In the north, it is popular in Zhu Fu, inheriting the study of Zuo Zhuan since the end of Han Dynasty. (See Biography of Shu Wei Scholars) During this period, all three biographies of Chunqiu were taught by doctors. Although Zuo Zhuan is mainly devoted to Shen Zhuan, Du Zhuan is also quite popular. In the Sui Dynasty, supremacy prevailed, while Zhu Fu gradually declined.