Du Pre (222-285), a native of Jingzhao Duling (now southeast of Xi'an, Shaanxi), was a famous politician, military strategist and scholar in the Western Jin Dynasty, and one of the commanders of the unification war to destroy Wu. He successively served as Cao Wei Shang Shulang, Henan Yin of the Western Jin Dynasty, Anxi Military Division, Qinzhou Thorn History, Duzhi Shangshu, Zhennan General, and the official to the lieutenant of the Division. After his success, he pondered the scriptures, was erudite and knowledgeable, and had many achievements, and was known as "Du Wuku". He is the author of "Collection of Interpretations of the Zuo Sutra in the Spring and Autumn Period" and "Interpretation of the Spring and Autumn Period". At the beginning of 285, Du Pre died at the age of 63, and posthumously presented the general of Zhengnan, Kaifu Yi and the three divisions, and became a marquis.

Du was born into a family of high-ranking bureaucrats in the Cao Wei government. Grandfather Du Yi was a famous minister of Cao Wei during the Three Kingdoms period, served as the Taishou of Hedong for 16 years, because of his close relationship with Xun Yu and Geng Ji, so he was not trusted by Cao Cao, until Cao Pi ascended the throne, he had the title, served as the Marquis of Guannei, and entered the court as a scholar. After Cao Pi became the emperor of the Han Dynasty, Du Ji was named the Pavilion Marquis, one hundred households. Yishangshu served as the acting lieutenant of the division, until the third year of the early Huang Dynasty, Du Yi was still a book, and the "Three Kingdoms" Cao Pi Benji recorded that "in the autumn and July, the Shangshu Du Ji held the festival to open a warehouse to relieve it." It can be seen that Cao Pi is not important to him, as early as the second year of Huang Chu, Sima Yi, who was also recommended by Xun Yu as Du Yi, was already the right servant of Shangshu. It was not until October of 222 A.D. (the third year of the early Huang Dynasty) that Cao Pi conquered Wu, and Du Yi was promoted to the rank of Shangshu servant, and Du Yi stayed in Luoyang. In September of the fourth year, when Cao Pi went to Xuchang again, he let Du Yi stay behind, and was ordered to build a dragon boat.

His father, Du Shu, stayed at home for a long time during the reign of Cao Pi and did not hold an official position. Until Wei Ming Emperor Cao Rui ascended the throne to serve as a loose cavalry attendant and other positions, he was loyal, upright, and the relationship with the power of the court was not compatible, Taihe three years because of the impeachment of the general Cao Zhen's younger brother Cao Fan and the Cao group contradictions, was sent to serve, and then said that he was sick in Yiyang Yiquanwu seclusion. After the death of Emperor Wei Ming, many people wrote to him, and he was related by marriage to Sima Yi, the ruling party at the time, so he served again as the Taishou of Hedong, which his father had governed for a long time. During Cao Shuang's reign, because Cao Shuang was Cao Fan's nephew, he took advantage of Du Shu's conflict with his boss to frame him and punish him with death. In the first year of Jiaping, Sima Yi staged a coup d'état to depose Cao Shuang, and Du Shu was also commuted to death. Du Zhen was not appointed because of his father's long-term conflicts with the emperor's relatives and magnates.

Although Du Yu grew up in an official family, he is not the kind of gentleman who only knows pleasure. He was well-read and diligent in writing from an early age, and studied economics, politics, calendars, law, mathematics, history, and engineering. People at the time once gave him the nickname "Du Wuku", praising him for his erudition and versatility, like an arsenal of weapons, all-encompassing. He especially likes to read "Zuo Chuan" and claims to have a "Zuo Chuan" fetish.

During the reign of Sima Zhao, Sima has become the largest political group of the Cao Wei regime, after Sima Zhao grasped the ruling power, in order to consolidate and expand the ruling base, under the premise of appointing virtuous people, he also appointed many clans and relatives. and restored his knighthood. Du Yu was younger than Sima Zhao, but older than Sima Zhao's younger brothers, Sima Gan and Sima Ling, and he married Sima Zhao's sister, Princess Gao Lu, and became one of the most prominent members of the Sima group. Du Pre served as an important staff member of Sima Zhao's Prime Minister's Mansion, and in the war to pacify the Shu Kingdom, he and Sima Zhao's chief bookkeeper Shi Su were both sent by Sima Zhao to serve as the key staff of the commander of the most important troops of the two roads, Shi Su was sent to serve as Deng Ai's Sima, and Du Pre was sent to Zhonghui's army.

In May of 263 A.D. (the fourth year of Jingyuan), the Wei army divided into three routes to attack Shu. Du Pre was appointed as the commander of the main army, Zhonghui, the head of the Zhenxi General's Mansion. The Wei army attacked and destroyed Shu Han, and Zhong Hui and Shu general Jiang Wei rebelled, preparing to kill the Wei generals who came with him in order to seize Yizhou. In the first month of the following year, Zhong Hui was killed by the rebels while carrying out the plan. In this upheaval, many of Zhonghui's subordinates were killed. His colleagues were all killed, but Du Zhen survived with his wisdom. Afterwards, he was added to 1,000 households because of his merits. He sympathized with Deng Ai's plight and should have been one of the few generals who demanded revenge for Deng Ai.

At the beginning of 270 A.D. (the sixth year of Taishi), Du Pre was relieved of his post as the commander of Henan Yin because he offended Shi Jian, the commander of the Sili school. In June, Emperor Wu of Jin enabled him to go out of the border pass of the town, first as the Anxi Military Division, and then as the commander of the Qinzhou Assassin Shi Lingdongqiang and the general of the light car. Du Yu had just taken office in Qinzhou, and his rival Shi Jian had also arrived here. Shi Jian, with the position of general Anxi, supervised the military of Qinzhou and was Du Yu's top boss.

At that time, the Longyou region where Du Pre was located was very unstable, and the Xianbei people were bald and rebellious, and the forces were very large, and the generals sent by Emperor Wu of Jin to suppress them were either defeated or killed.

Shi Jianguan avenged his personal revenge and ordered Du, who had only three hundred soldiers and a hundred mounts, to attack. Du saw through Shi Jian's conspiracy and refused to send him to death. He contradicted Shi Jian and said that June, when the grass was full of horses and fat, was not suitable for fighting against the Xianbei people at all, and that the problem of the supply of troops for the government army must also be solved in advance, so the time of the battle could only be set in the spring of the following year. Du Zhen summed up his opinions as "five must nots, four do nots". Du Pre refused to send troops, which angered Shi Jian. Shi Jian found a crime and sent Du Pre to be arrested and handed over to Ting Wei for punishment. Thanks to Du Pre's marriage relationship with the royal family, he was able to save his life within the scope of the pardon of the "Eight Discussions", but he still lost his title. Soon, Shi Jian was defeated by the bald tree function in a battle, and Du Qian's opinion proved to be correct.

In November 271 A.D. (the seventh year of Taishi), the Xiongnu living in Shanxi Province rebelled under the leadership of the chieftain Liu Meng. Because Du was good at planning and planning, the imperial court re-used him as a staff officer for military planning. Soon after, he was appointed as the secretary of the government and was in charge of the government's economic and financial affairs. After that, until 278 A.D. (the fourth year of Xianning), Du Pre served as the secretary of the Duzhi for a total of seven years. In the meantime, because of Shi Jian's revenge, he was once dismissed, but it was short-lived. During his tenure, Du Zheng put forward more than 50 proposals to Emperor Wu of Jin for governing the country and the army, including the construction of Chang Ping, the adjustment of grain prices, the management of salt transportation, the formulation of tax adjustments, and the construction of border defenses. In addition, he also made full use of his ingenuity and actively engaged in scientific inventions. The company pre-manufactured a new device and copied the long-lost device. In order to solve the traffic problem in Luoyang, he overrode public opinion and presided over the construction of the Fupingjin Bridge. In the process of building the bridge, great effort was paid from design to construction. Du pre-found that the prevailing calendar at that time did not conform to the sundial degree, and after calculation, corrected the discrepancies, and revised the "Binary Dry Calendar". This calendar has been verified and finally replaced the time calendar and is in common with the world.