In May of the fourth year of Jingyuan (263), the Wei army divided into three routes and attacked Shu on a large scale.

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.

In July of the first year of Xianxi (264), Sima Zhao ordered Du to participate in the formulation of the law.

This law is the "Jin Law", which inherits the "Han Law" and the "Tang Law", and has a great influence on the feudal laws of later generations. The official who nominally presided over the revision of the law was Jia Chong, but in fact Du preempted the most heavy labor, and all the annotations of the Jin Law were completed by him.

…… ……

At the beginning of the sixth year of Taishi (270), Du Pre was relieved of his post as the commander of Henan Yin because he offended Shi Jian, the captain of the Sili school. In June, Sima Yan enabled him to leave the border of the town. Du Yu had just taken office in Qinzhou, and Shi Jian, who had never been on good terms with him, also arrived here.

Shi Jian supervised the military of Qinzhou as the general of Anxi, and was Du Pre's boss.

Shi Jianguan took revenge and ordered Du Pre-attack, who only had 300 soldiers and 100 mounts.

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 the Xianbei people at all, and 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 must nots" and refused to send troops. This angered Shi Jian. He found a crime and sent Du Pre to be arrested and handed over to Ting Wei for punishment.

Hearing that he was convicted, his wife, Princess Gao Lu, directly found the emperor Sima Yan. Princess Gao Lu is Sima Yan's aunt, and when she told him about this, she must not be beaten and scolded again? Therefore, Du Yu's life was safe, 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.

Soon, he was appointed as the secretary of the Duzhi Shangshu and was in charge of the economic and financial affairs of the first place.

After that, until the fourth year of Xianning (278), Du served as the finance minister of the Jin State for a total of seven years (Duzhi Shangshu).

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. Du pre-built a new device and copied the long-lost qī 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.

…… ……

After Sima Yan ascended the throne, he always wanted to launch a war to destroy Wu, but the opinions within the Western Jin Dynasty were not consistent. Except for a few ministers such as Yang Hu and Zhang Hua who supported Sima Yan's idea, most of them had an ambiguous attitude.

In the spring of the fourth year of Xianning (278), Yanghu, the commander of the Jin army on the Jingzhou front, suddenly fell seriously ill, and Sima Yan, who had always been indecisive, regretted it a little and wanted to let Yanghu go out with illness, but Yanghu died soon.

Before his death, Yang Hu recommended Du Pre to Sima Yan to replace him, thinking that he could take on this important responsibility.

In November, Sima Yan was reappointed as Du Pre as the general of Zhennan. After receiving the order, Du pre-went south to Xiangyang (now Xiangyang, Hubei) to prepare for the upcoming war to exterminate Wu.

After Du Pre arrived in Jingzhou, he actively carried out military deployment, and at the same time sent troops to attack Xiling.

After capturing Xiling, he immediately wrote to Sima Yan asking for war.

When Du Pre's book was sent to Sima Yan this time, the minister Zhang Hua was playing chess with Sima Yan.

When Zhang Hua saw the letter, he immediately pushed away the chessboard, persuaded Sima Yan to stop being indecisive, and begged him to adopt Du Yu's suggestion. Sima Yan finally made up his mind and immediately sent troops to attack Sun Wu.

In November of the fifth year of Xianning (279), Emperor Wu of Jin mobilized more than 200,000 troops, divided into six routes, advanced by land and water, and attacked Eastern Wu on a large scale. Du Zhen did not serve as the commander in this war, and Emperor Wu of Jin only appointed him as the commander of the Western Front, with the specific task of taking Jiangling and occupying Jingzhou, and was responsible for dispatching the sailors of Wang Jun, the assassin of Yizhou, in the Jingzhou area.

In the first month of the first year of Taikang (280), Du Pre ordered his army to surround Gangneung and encircle it without destroying it. After cutting off Gangneung from the outside world, he immediately mobilized his forces to the west to seize a number of cities along the river.

After clearing the perimeter of Jiangling, Du Yu quickly took Jiangling and occupied Jingzhou.

Du Zhen also divided his troops to the south and captured the Jiaozhou and Guangzhou regions, which are now Guangxi and Guangdong. In the entire battle to destroy Wu, Du made outstanding contributions.

Du Yu himself has almost no martial arts. According to the Book of Jin, he couldn't even ride a horse, and his archery skills were terrible. But whenever there was a military activity, the imperial court had to call him to plan for the staff. He knows his opponent and knows his friends, and is good at fighting wits with his enemies.

In the war to destroy Wu, the Wu people hated Du Yu the most, mainly because he was good at using troops and often dealt fatal blows to the enemy.

Du Pre had a big neck disease (usually a goiter), so the Wu people put a water scoop on the dog's neck, saw the tree with a long bag, wrote "Du Pre Neck", and then cut it off, in order to vent their hatred for Du Pre.

The war in which the Western Jin Dynasty destroyed Sun and Wu was an important war in Chinese history. It put an end to the state of division and separation since the end of the Han Dynasty and the Three Kingdoms, and reunified China. It was also the only successful unification war in the 400 years of the Wei, Jin, Southern and Northern Dynasties. Du Zhen showed outstanding military talent in this war, and his exploits were very outstanding.

After the Western Jin Dynasty destroyed Wu and unified the country, Du Pre was awarded the title of Marquis of Dangyang County for his merits, and increased the number of food to 9,600 households, and his son Du Tan was also named the Marquis of Ting, with 1,000 households and 8,000 pieces of silk, and Du Pre continued to guard Xiangyang.

He opposed the idea that armaments should be discarded when the world was stable, and during his tenure of office, he never relaxed the training of the troops.

In Jingzhou, Du pre-built a number of water conservancy projects. Among them, on the basis of renovating the river canals of the previous generation, he diverted the water of the two rivers of 滍 (zhì) and Shushui into the fields, benefiting more than 10,000 hectares of farmland.

Du pre-dug more than 10,000 miles of canal from Yangkou to Baling, so that Xiashui and Yuan and Hunan rivers could communicate directly, which not only solved the problem of flood discharge on the Yangtze River, but also improved the transportation between the north and south of Jingzhou.

Du Pre's political achievements were praised by the local people, and the people called him "Du Father", and sang praises, "Later generations have no rebellion by Du Weng, who knows wisdom and fame and bravery." ”

During this period, his home was still in Luoyang, and he and his wife, Princess Gaolu, often exchanged letters. One year, when he returned home, his wife, Princess Gaolu, asked him to bring back some special products from the place where he lived and give them to the powerful people of the dynasty. It's called bribery! It's a sin. ”

His wife, Princess Gao Lu, said, "I searched all over your annotations of the "Jin Law", why didn't I find this one? ”

Du Pre said, "Tomorrow in the imperial court, I will start your majesty and add this article to the "Jin Law". As soon as this wind opens, it's terrible, isn't this corruption? ”

His wife, Princess Gaul, covered his mouth and said, "If you want to add it, you have to wait until you come home from your foreign post and retire to retire, otherwise, can you stand the lips and tongues of those powerful people?" Giving them something is gagging them so that they don't frame you. ”

Du thought about it, recognized his wife's words, hugged his wife, and kissed her (was there a "kiss" at that time?). There should be, the invention of the word "kiss" was earlier than the Three Kingdoms) said, "Baby, you have to think about it thoroughly, my husband knows, and he will bring back the special products to those powerful people every year in the future!" ”

Therefore, every year, Du Yu has to transport back a large number of special products to give gifts and bribe them. He once told others that he was not trying to gain any benefit from them, but only hoped that the powerful would not harm him.

This plot can be found in the Book of Jin. Before and after Jin, bribery became almost the norm.

In the twelfth month of the fifth year of Taikang (early 285), Du was recruited to the central ** as a lieutenant of the department, on the way to Deng County, died suddenly, at the age of sixty-three, Sima Yan was very mournful, posthumously presented the general of Zhengnan, Kaifu Yi and the three divisions, and was called Chenghou.