After the Emperor Li of Jin was imprisoned, Wang Sun Yue began to prepare for Sun Zhou's return to the Jin Kingdom to inherit the throne. Sun Zhou did not understand why he would become the next Marquis of Jin, Wang Sun Yue said: "The Eastern Zhou Dynasty is known as the second office of the Jin Kingdom; Zhou Pu is equivalent to Jin Linggong, and you are the next Jin Chenggong. ”

From that time on, Wang Sun Yue selected many chapters from the vast historical books that he thought would be helpful to Sun Sunday's governance of the Jin state, and asked him to carefully study and ponder them. Sun Zhou stopped all activities, and began to read at sunrise every day, and did not stop until late at night; Wang Sunyue took leave from the royal family and stayed by his side, helping him analyze problems, enlighten him, inspire him, and teach him how to govern the people with righteousness and control officials with surprise.

In the first month of the eighteenth year of Lu Chenggong (BC573), Luan Shu ordered Cheng to slip and kill Jin Ligong, and ordered Zhigang and Shi Yi to go to Chengzhou to welcome Sun Zhou back to China. Sun Zhou was surrounded by envoys and embarked on the road back to China, while the doctors of the Jin Kingdom greeted the honor guard in Qingyuan.

When Sun Zhou saw Luan Shu, Han Ju, Zhongxingyan and other ministers, he said solemnly: "Before returning to the Jin Kingdom, I have something to say: I have never had the luxury of becoming the king of Jin, but today I actually came here and met you, I am afraid this is the will of heaven!"

"The reason why the Jin people support the monarch is nothing more than the need for a person to issue orders; If you appoint me and do not carry out my commands, what else do you need a monarch to do? Therefore, please consider carefully what I have said, and then decide whether or not to make me king. If you set me up, do my commandments respectfully; If not, let me return to the Eastern Zhou. It's up to you to decide what to do. ”

Luan Shu and the doctors replied: "We are willing to make you the king, and we dare to listen to orders." ”

Sun Zhou was satisfied with the results and continued with his ministers. On 15 January, Sun Zhou made an alliance with his ministers and entered Xintian. When he entered the city, it was late, and Sun Zhou had not yet been crowned, so he could not enter the public bed, so he stayed at the same house as the doctor and uncle that night. The next day, the ministers held a coronation ceremony for Sun Zhou at the temple of Jin Wugong, and Sun Zhou ascended the throne to mourn the Duke of Jin.

The ruling system of the Jin State has been riddled with holes: four of the thrones alone have been vacated; Doctors were killed, expelled, condemned, and fled voluntarily; Many departments have been shut down, and various dossiers are piling up but no one is dealing with them.

The Duke of Jin Mourning first appointed a hundred officials. He ordered Wei Xiang (Lü Xiang), Shi Yi, Wei Jie, and Zhao Wu to be the secretary; Among them, Wei Xiang is the son of Wei Wei, Shi Yi is the son of Shihui and Shi Xie's brother, Wei Jie is the son of Wei Wei, and Zhao Wu is the son of Zhao Shuo.

Luan Shu had a lot of complaints about the above appointment, and he originally wanted to promote Luan Wei to the position of secretary, but his hopes were disappointed. He also asked Jin Mourning Gong to list Luan Wei as the head of the Gong family's doctors, but Jin Mourning Gong appointed Xun Jia, Xun Hui, Luan Wei, and Han Wuji as Gong Clan doctors, and Luan Wei only ranked third.

After that, Jin mourned the prince and ordered him to revise the laws formulated by the Shihui for the Taifu period; He ordered Youxing Xin (Jia Xin, a descendant of Jia Hua, the right-bound general during the Jin Huigong period) to be the Sikong and revise the regulations formulated by Shifeng. Luan Jie was appointed as the official commander of the Imperial Rong, in charge of the country's military and horse affairs, and commanded and trained the whole army of the Imperial Rong; Xun Bin is the right of the public car, and leads and trains the right of the whole army.

Revoke the right of the car appointed by the secretaries themselves, and appoint all lieutenants and lieutenants to be the right of the secretaries. ordered Qi Xi to be the lieutenant of the middle army, and the sheep tongue post was the lieutenant; Wei Jiang is the Sima of the Chinese Army; Zhang Lao is the Hou Cover, in charge of scout affairs; Duo Ji became a captain; Ji Yan is the Sima of the Shangjun; Cheng Zheng is a horse rider and is in charge of chariot affairs.

Through the above appointments, it can be seen that the Jin Mourning Gong has carried out a drastic reform of the official position system, one is to enable outstanding people from various clans to hold official positions, and the Wei family also took this opportunity to enter the list of secretaries for the first time; the second is to appoint military lieutenants as the right of each secretary to supervise the illegal acts of the secretaries; The third is to abolish the Great Sima and set up a separate Sima in each army.

The core purpose of the reform is to decentralize power, to distribute the power in the hands of the secretaries to other officials, and to use the new secretary to oppose the secretary of the world; and the refinement of government and military official positions to cope with the increasingly complex and changing reality.

Subsequently, the Jin Mourning Gong issued a series of imperial decrees that were effective in changing the status quo of national governance, including the abolition of a series of evil laws and edicts issued during the reign of the Jin Li Gong; Remove officials from their posts who eat and die, purge the official system, and abolish bloated establishments; The land and rewards were recovered from the fortunate ministers and favored concubines of the Duke of Jin Li and redistributed; relief for the poor and widowed and lonely; vigorously fight crime and rehabilitate those who have been wronged; Collect taxes, reduce forced labor, and stabilize people's livelihood; Promote a culture of frugality and prohibit alcoholism and lewd pleasures.

The Jin State then lived in harmony with the top and bottom, the government and the people were harmonious, the people lived and worked in peace and contentment, there was no dissatisfaction, and the new monarch was thanked from the bottom of his heart, and the Jin State embarked on the road of regaining hegemony.

Luan Shu has entered the political arena since the Jin Chenggong period and has been a veteran of the Four Dynasties. This person has pursued two things all his life: power and fame; And pleasure and depravity have nothing to do with him.

After the Battle of Chengpu, Luan Shu once thought that his power had surpassed that of Zhao Dun back then, and his reputation was higher than that of the previous Taxi Association; But at the moment when Xu Tong arrested him, he felt that all his fame and fame had disappeared and returned to dust. Luan Shu was ferocious and took fierce revenge on the enemy. After imprisoning Duke Jin Li, Luan Shu tried to gain the reputation of "Zhu Yifu", but after all, he still bore the notoriety of "monarch killer".

Luan Shu had never met Sun Zhou before, and he didn't know him at all. Luan Shuli's thinking logic is, "A hairy boy who has never been to the Jin Kingdom can succeed to the throne only by virtue of his identity as the great-grandson of Duke Wen of Jin, how much storm can such a little guy rise in the Jin Kingdom?" Don't I have to call the shots of national affairs? ”

But when Luan Shu saw Sun Zhou for the first time in Qingyuan and heard his speech, he realized that the boy in front of him, who was only fourteen years old, had a city that was not commensurate with his age - Sun Zhou attributed his fate to the arrangement of God, and if he continued to seek power with the king, he would be against God.

Luan Shu's heart was full of apprehension and worry. Sure enough, he was defeated in the first round of the battle with Jin, and Luan Shu felt that his future was dangerous and disheartened, and soon he had the idea of quitting politics.

On the other hand, the Duke of Jin was extremely hostile to the monarch killer (which had nothing to do with the identity of the monarch killer), especially since the monarch had a personal grudge with his family.

It turned out that in order to get rid of Zhao Kuo and Zhao Tong, Luan Shu labeled the two of them as "vainly trying to murder Duke Jing and re-establishing Gongsun Tan as the king"; In order to get rid of Sanhe, they were labeled as "vainly trying to murder Li Gong and re-establishing Sun Zhou as the king".

It can be seen that Luan Shu not only never really thought about supporting Sun Zhou, but also used Sun Zhou's father and son as a basin to frame political enemies. Luan Shu not only used this to get rid of his political enemies, but also tarnished the reputation of Gongsun Tan and his son, and even put their lives at risk (Jin Li Gong once attempted to assassinate Sun Zhou).

"Luan Shu not only killed the king, but also committed the crime he made for Sanhe, where is there loyalty at all? Luan Shu framed Dr. Qingshi, where is there still integrity? Where can this disloyal and evil monarch killer still gain the trust of the widows? Jin Mourning Gong thought so.

So when Luan Shu took Luan Wei to ask Jin Mourning Gong to resign, Jin Mourning Gong just approved it with a blank face and a little politeness, and did not even ask him for his opinion on the successor candidate.

The next day, Jin Mourning Gong ordered Han Ju to be the general of the Chinese army, and ordered Luan Wei to succeed Luan Shu as secretary.