Li Shimin's meritorious achievements are high, and his eldest grandson Wuji, Wei Chigong, Hou Junji, Zhang Gongjin, Liu Shili, Gongsun Wuda, Dugu Yanyun, Du Junxuan, Zheng Rentai, Li Mengwei (one is said to be the eldest grandson Wuji, Wei Chigong, Fang Xuanling, Du Ruhui, Yu Wenshi, Gao Shilian, Hou Junji, Cheng Zhijie, Qin Qiong, Duan Zhixuan, Qu Tutong, Zhang Shigui) and other civil and military generals.

The crown prince Li Jiancheng began to be suspicious and wary of Li Shimin.

Under the emperor, the crown prince is the first, and various measures such as cutting his post can be taken to block Li Shimin.

The officials of the Qin Palace's staff were worried, frightened, and at a loss.

Fang Xuanling and the eldest grandson Wuji discussed: "Now that the grudge has been caused, once the disaster breaks out, it will not only be out of control in the Qin Palace, but in fact, the survival of the society will become a problem." It is better to persuade the King of Qin to take actions similar to those of Zhou Pingding's Uncle Guan and Uncle Cai, so as to stabilize the royal family and the country. Survival, cardinal, the situation is critical, now is it!"

Eldest Sun Wuji said: "I have had this idea for a long time, but I don't dare to say it. What you are saying now is exactly what I want. Please let me tell King Qin on your behalf. "

So, the eldest grandson Wuji entered the inner room and told Li Shimin.

Li Shimin summoned Fang Xuanling to discuss the matter, and Fang Xuanling said: "The king has covered the world and should inherit the emperor's great cause." Now the king is worried about the crisis, and it is the heavens who are helping the king. I hope the king won't be confused. "

So, Fang Xuanling and Du Ruhui jointly persuaded Li Shimin to kill Li Jiancheng and Li Yuanji.

At the same time, Li Jiancheng and Li Yuanji saw that the generals of the Qin Wangfu were brave and good at fighting, and adopted lure methods to secretly give a cart of gold and silver artifacts to Chi Gong, the second deputy guard captain on the left.

Li Jiancheng personally wrote a letter to induce Wei Chigong to say: "I hope to get your favor so that we can deepen our friendship with cloth and clothes."

Wei Chigong immediately reported the matter to Li Shimin.

Li Shimin said: "Ming Gong's loyalty to me is as solid and firm as the mountains, even if the gold he gave you is piled up to the Big Dipper, I know that Ming Gong's loyalty will not waver." You will accept whatever he gives you, and what is there to doubt about that! Besides, wouldn't it be a good strategy to understand his plot by doing so! Otherwise, evil will befall you. "

Wei Chigong said: "I am a small person who weaves tents for households and breaks urns for windows, and when I encounter the situation of endless wars and exiles in the last years of the Sui Dynasty, I have long been reduced to the situation of resisting the imperial court. The king of Qin gave me the grace of rebirth, and now I am registered as an official in the palace of the king of Qin, and I should only repay the king of Qin with death. I have not made meritorious contributions to His Royal Highness the Crown Prince, and I dare not accept such a generous reward from His Royal Highness the Crown Prince out of thin air. If I have a private relationship with His Royal Highness the Crown Prince, I will have two hearts for the King of Qin, and I will be a villain who forgets his righteousness, so what is the use of His Highness wanting such a person!"

Li Jiancheng was furious and cut off contact with him.

Soon after, Li Yuanji instructed the warriors to assassinate Yu Chi Gong at night.

After Wei Chigong learned of this news, he opened the doors layer by layer, and at the same time set up a defensive array, tight inside and loose outside.

He lay unmoved, and the Assassin repeatedly came to his courtyard, but finally did not dare to enter the house.

Therefore, Li Yuanji framed Wei Chigong to Gaozu, put him in a special prison ordered by the edict for interrogation and punishment, and prepared to kill him, but Li Shimin was spared because of Li Shimin's repeated requests to save his life.

Li Yuanji framed Cheng Zhijie, the commander of the Zuo Yi Ma Army, and Gaozu exiled him as the assassin of Connecticut.

Cheng Zhijie said to Li Shimin: "The king's assistants are almost gone, how can the king himself last long!" I swear not to leave the capital, hoping that the king will make a plan as soon as possible. Li Yuanji used gold and silver silk to lure Duan Zhixuan, the second protector on the right, but Duan Zhixuan refused to obey. Li Jiancheng said to Li Yuanji: "Among the wise and resourceful figures in the Qin Palace, only Fang Xuanling and Du Ruhui are worthy of fear." Li Jiancheng and Li Yuanji framed the two of them to Gaozu and caused them to be expelled.

Li Shimin's henchmen were the only eldest grandson Wuji who remained in the palace of King Qin, and he and his uncle Gao Shilian in Yongzhou Zhizhong, Hou Junji, the general of the right waiting car, Hou Junji, and Wei Chigong, persuaded Shimin to kill Li Jiancheng and Li Yuanji day and night, but Li Shimin hesitated. In addition, Li Shimin may have asked Li Jing, the governor of Lingzhou, and Li Ji, the head of the march.

Xuanyuan calculated the heavenly machine through the sky, and pointed out Li Shimin in his dream.

Xuanyuan Jingtian said, "On the first day of the sixth month (June 29, 626), the Tai Bai Star will appear at noon in the south of the sky, which is a symbol of "changing the sky", you can do it cheaply and achieve great things" Li Shimin believes that the gods will definitely succeed in their dreams.

As a result, Li Shimin bribed Wang Hui, who held the position of leader in the prince's East Palace, and became Li Shimin's eyeliner in the East Palace. Wang Hui whispered to Li Shimin: "The crown prince said to King Qi: 'Now, you have obtained the brave generals and elite soldiers of the King of Qin, and you have tens of thousands of soldiers and horses. I and the King of Qin in Kunming Pool for you, let the warriors kill the King of Qin in the tent, and when I played the emperor, I said that he died of a violent illness, and the emperor should not believe it. I should let people speak up and force my father to hand over the affairs of the state to me. Wei Chigong and the others have fallen into your hands, they should all be killed, who dares to disobey!'"

Li Shimin told the words of the immortal dream and the officials surnamed Wang to the eldest grandson Wuji and others, and the eldest grandson Wuji and others persuaded Li Shimin to strike first.

Li Shimin sighed: "Cannibalism is a great crime throughout the ages. Of course, I know that disaster is coming, but I plan to fight them again after it happens, isn't that okay!"

Wei Chigong said: "Since there is a dream of immortals, it means that the king is granted by God." Disaster was about to happen, but the king remained calm and unfazed. Even if the king looks down on himself, how can he be worthy of the Zongmiao Sheji! If the king refuses to adopt my proposal, I am ready to flee to the wilderness and grass, and I cannot stay with the king and leave it to be slaughtered!"

The eldest grandson Wuji said: "If the king refuses to listen to Wei Chigong's proposition, the matter will definitely fail." Wei Chigong and the others will definitely not follow the king anymore, and I should follow them to leave the king, and I can no longer serve the king!"

Li Shimin said: "The dream of the gods should not be true."

Wei Chigong said: "It is unwise for the king to hesitate to deal with things now; In the face of danger, it is not decisive to make a decision. Besides, the more than 800 Dacheng real people that the king usually raises have now entered the palace, they are wearing armor and holding weapons, and the situation of the uprising has been formed, how can the king stop it!"

Li Shimin asked the staff of the Qin Palace, and everyone said: "The King of Qi is vicious and perverse, and he is unwilling to serve his brother after all." Recently, I heard that the protector Xue Shi once said to King Qi: "The name of the king can be combined to become a Tang character, and the king will dominate the Tang Dynasty after all." The King of Qi said happily, "As long as the King of Qin can be removed, it will be easy to seize the position of the crown prince of the East Palace." Before he succeeded in plotting a rebellion with the crown prince, he already had the intention of seizing the crown prince's throne. If the mind of chaos is not satisfied, what can not be done! If these two people get their wish, I am afraid that the world will no longer belong to Datang. With the king's meritocracy, it is as easy to capture these two people as it is to pick up the mustard on the ground, how can he forget the great affairs of the state and society in order to keep the discipline of the horseman!"

Li Shimin was still undecided, and everyone asked again: "What kind of person does the king think Shun is?" Li Shimin replied: "He is a saint." Everyone said: "If Emperor Shun had not escaped the poisonous hands of his father and younger brother who filled the well when he dredged it, it would have turned into soil in the well; If he hadn't escaped the poisonous hands of his father and younger brother who had set fire to the granary when he was decorating the granary, and he would have turned into ashes on the granary, how could he still have his blessings spread all over the world and the law passed on to future generations! Therefore, Emperor Shun endured it when he was beaten by his father with a small stick, and fled when he was beaten with a big stick, probably because Emperor Shun had a big thing in mind. "

At this time, Yan Liyan came to divinate on the order of Xuanyuan Jingtian. Yan Li couldn't speak, but he had no last resort, and deliberately calculated the hexagram for Li Shimin. Heaven and earth are handed over, and the hexagram is up.

Xuanyuan Jingtian dreamed for several nights in a row.

Li Shimin ordered the eldest grandson Wuji to secretly recall Fang Xuanling and others, but Fang Xuanling and others did not agree to return to the Qin Palace, saying: "Your Majesty's edict does not allow us to serve the king anymore. If we go to the king in private now, we will surely die for it, and therefore we will not dare to accept the king's decree!"

Li Shimin was angry and said to Wei Chigong: "Fang Xuanling and Du Ruhui want to betray me!"

He took off his saber and handed it to Wei Chigong and said, "Ming Gong went to check the situation, if they really didn't mean to come back, you can cut off their heads and come back to see me."

Wei Chigong went forward, and together with the eldest grandson Wuji, he clearly indicated Fang Xuanling and the others and said: "The king has decided on the plan of action, and all the Ming princes should go to the Qin Palace" to discuss major matters as soon as possible. The four of us couldn't walk together on the street. So he ordered Fang Xuanling and Du Ruhui to put on Taoist clothes and enter the Qin Palace, while Wei Chigong also came to the Qin Palace.

On July 1, 626, the star again appeared at noon in the south of the sky during the day.

Xuanyuan Jingtian dreamed again.

Fu Yi secretly played: "Venus appears on the division of Qin, which is a sign that the King of Qin should have the world." Gaozu showed Fu Yi's secret recital to Qin Wang Shimin.

So in this way, Li Shimin took the opportunity to secretly play his father, accusing Li Jiancheng and Li Yuanji of adultery with the concubines in the harem, and said: "Erchen is not sorry for the imperial brother and the imperial brother at all, but now they plan to kill Erchen, which is like avenging Wang Shichong and Dou Jiande." Now that I am about to die unjustly, I will leave my father forever, and my soul will return to Huangquan, and I will be ashamed to see Wang Shichong and all the thieves!" Gao Zu looked at Li Shimin, was surprised, and replied, "I will interrogate this matter tomorrow, and you should come to see me as soon as possible."

Zhang Jieyu secretly learned the gist of Li Shimin's secret performance, and hurriedly told Li Jiancheng. Li Jiancheng summoned Li Yuanji to discuss the matter, and Li Yuanji said: "We should take care of the soldiers in the East Palace and the Qi Palace, and pretend that they are sick and do not go to the court, so as to observe the situation." Li Jiancheng said: "The army in the palace is already very well guarded, and my brother and I should enter the court to see and inquire about the news in person." So the two decided to enter the Ouchi Palace first to force Gaozu to express his position. Unexpectedly, Chang He, the chief of the Praetorian Guard at the Xuanwu Gate at the north gate of the palace, was originally a close confidant of the prince, but was rebelled by Li Shimin, so the palace guards had fallen to the King of Qin, but Li Jiancheng and Li Yuanji didn't know, and thought that the palace was still their own people.

On the fourth Gengshen day of the sixth month of the ninth year of Wude (July 2, 626), Li Shimin led the eldest grandson Wuji, Wei Chigong, Hou Junji, Zhang Gongjin, Liu Shili, Gongsun Wuda, Dugu Yanyun, Du Junxuan, Zheng Rentai, Li Mengwei (one said to be the eldest grandson Wuji, Yu Chigong, Fang Xuanling, Du Ruhui, Yu Wenshi, Gao Shilian, Hou Junji, Cheng Zhijie, Qin Qiong, Duan Zhixuan, Qu Tutong, Zhang Shigui) and others into the court, and laid an ambush in Xuanwumen. Li Jiancheng and Li Yuanji didn't know the details, so they also entered the court together and rode to Xuanwu Gate. At this time, Gao Zu had already summoned Pei Lian, Xiao Yu, Chen Shuda, Feng Deyi, Pei Ju and others to prepare to inspect this matter.

Li Jiancheng and Li Yuanji came to the Linhu Palace, noticed the change, and immediately turned the horse's head, preparing to return to the East Palace and the Qi Palace.

When several people met, Li Yuanji wanted to strike first, and shot at Li Shimin with a bow and arrow, but because Xuanyuan Jingtian was secretly protecting, he set up a human emperor defense circle for Li Shimin, and the arrow did not hit.

After being reminded by Xuanyuan's Heavenly Divine Sense, Li Shimin immediately shot at Li Jiancheng with a bow and shot him to death.

Wei Chigong led seventy people from Dacheng to arrive one after another.

A Dacheng real person shot Li Yuanji with an arrow, and Li Yuanji fell off his horse.

But at this moment, Li Shimin's mount was frightened, and he ran into the woods next to the Xuanwu Gate with Li Shimin, and Li Shimin was caught by the branches in the forest, fell off his horse, fell to the ground, and couldn't get up for a while.

Li Yuanji quickly arrived, grabbed the bow, and prepared to strangle Li Shimin, but fortunately, Li Shimin was protected by the Emperor's Defense Array. And at this moment, Wei Chi Gong jumped on his horse and shouted at him. Li Yuanji knew that he was not an opponent, so he hurriedly let go of Li Shimin and wanted to run into the Wude Hall to seek protection from his father, but Wei Chigong quickly caught up with him and shot him to death with an arrow.

Feng Li, a subordinate of the crown prince Li Jiancheng and the general of the Yiwei chariot cavalry, learned that Jiancheng had died, and sighed: "Can you receive favor during the prince's lifetime and escape the disaster as soon as the prince dies!" So, he and his deputy protector Xue Wanche and Qu Zhifu's left chariot Xie Shufang led 2,000 elite soldiers and horses from the East Palace and the Qi Palace, and galloped to Xuanwu Gate, preparing to avenge the prince and the King of Qi. Zhang Gongjin had great strength, and he closed the gate alone, blocking Feng Li and the others, and Feng Li and the others could not enter. Yunlu general Jing Junhong was in charge of the Su Guard Army and was stationed at Xuanwu Gate. He stood up and prepared to go to battle, but those close to him stopped him and said, "Before the matter is clear, let's observe the development of the situation slowly, and wait until the forces are gathered and form an array before going to war." Jing Junhong did not listen, so he and Zhonglang general Lu Shiheng shouted loudly and rushed towards the enemy formation, but they were all killed. The soldiers guarding the Xuanwu Gate fought hard with Xue Wanche and others, which lasted for a long time, Xue Wanche beat drums and shouted, preparing to attack the Qin Palace, and the soldiers were greatly frightened. At this time, Wei Chi Gong carried the heads of Jiancheng and Yuanji to Xue Wanche and others, and the people of the East Palace and the Qi Palace's Mansion lost their fighting spirit and quickly dispersed, while Xue Wanche and dozens of cavalry fled into Zhongnan Mountain. After Feng Li killed Jing Junhong, he said to his subordinates: "This can also repay His Royal Highness the Crown Prince a little." So he threw away his weapon and fled. At this point, the coup ended with the victory of Li Shimin, the king of Qin.

At the time of the coup, Gaozu was rowing on the sea pool in the palace, and Li Shimin asked Wei Chigong to enter the palace as a guard. Wei Chigong was wearing armor and holding Changyu in his hand, and went straight to the ship where Gao Zu was.

Gao Zu was shocked and asked, "Who is the person who is making trouble today?" What is Aiqing doing here?" Wei Chigong replied: "The King of Qin raised an army to kill them because of the rebellion between the crown prince and the King of Qi. His Royal Highness the King of Qin was worried about alarming His Majesty, so he sent his ministers to serve as guards. "

Gaozu said to Pei Lin and the others: "I didn't expect this kind of thing to happen today, what do you think should be done?" Xiao Yu and Chen Shuda said: "Jiancheng and Yuanji did not participate in the strategy of raising volunteers to resist the Sui Dynasty, and they did not make contributions to the world. They were jealous of King Qin's great merit and prestige, so they planned a treacherous conspiracy together. Now that the King of Qin has denounced and killed them, the King of Qin has covered the universe and the world has returned to his heart, if His Majesty can decide to make him the crown prince and entrust him with national affairs, there will be no more incidents. Gao Zu said, "Good! That's exactly what I've always wanted. At that time, the battle between the Su Guard Army and the soldiers and horses of the Qin Palace's Mansion and the cronies of the East Palace and the Qi Palace's palace had not stopped, and Wei Chigong asked Gaozu to issue a handwritten edict, ordering all armies to accept the disposal of the King of Qin, and Gaozu followed his advice. Sima Yu, a scribe of the Tiance Mansion, came out of the Dongshang Pavilion Gate to announce the edict, and everyone settled down in this way. Gaozu also asked Pei Lian, the squire of the Yellow Gate, to go to the East Palace to enlighten the soldiers under the command of Li Jiancheng, and the soldiers all abandoned their posts and dispersed. So, Gaozu summoned the people of the world to come and comfort him: "In recent days, I have almost had doubts about throwing a tree." Shimin knelt down, prostrated himself on Gao Zu's chest, and wept for a long time.

Li Jiancheng's sons Li Chengdao, King of Anlu, Li Chengde, King of Hedong, Li Chengxun, King of Wu'an, Li Chengming, King of Runan, Li Chengyi, King of Julu, Li Yuanji's son Li Chengye, King of Liangjun, Li Chengluan, King of Yuyang, Li Chengyu, King of Pu'an, Li Chengyu, King of Jiangxia, Li Chengdu, King of Yiyang, and other children were brutally killed, and their names were also deleted from the clan register.

Legend has it that Li Shimin was afraid that his brother's ghost would come to ask for his life, so he sent Wei Chi Gong and Qin Qiong, masters of the Yang God Realm, to serve as guards in front of the door.

Later, Wei Chigong and Qin Qiong turned into clones, turned into portraits, hung at the door, and waited in front of the door day and night. In later generations, the people did not know about the incarnation, so they worshiped Wei Chi Gong and Qin Qiong as the door gods, and posted them in every household.

The female dependents of the original East Palace and the Qi Palace, all of them were submerged in the palace, and later became part of Li Shimin's harem, among which the more famous is the original Li Yuanji's wife Yang, Li Yuanji was accepted as a concubine by Li Shimin after his death, but there was no official title, and the palace was called "Princess Chaora", and she was the only concubine who gave birth to a child after the death of the eldest grandson queen.

The generals of the Qin Palace's palace were ready to kill all the more than 100 cronies of Li Jiancheng and Li Yuanji, and confiscate their family property from the official palace. So the generals stopped the pursuit. On the same day, Gaozu issued an edict to pardon the world, and the charges of rebellion were only imposed on Li Jiancheng and Li Yuanji, and the rest of the henchmen, especially the monks above the Dacheng Zhenren level, were not investigated. Monks, nuns, and Taoist priests of both sexes should be dealt with in accordance with the original edict. All the affairs of the state were left to the disposal of the King of Qin.

On July 5, the ninth year of Wude (626), Gaozu appointed Li Shimin, the king of Qin, as the crown prince, and issued an edict: "From today on, all affairs of the army and the state, no matter how big or small, will be entrusted to the crown prince to handle and decide, and then report to me."

On the second day of Gaozu's promulgation of the succession system, that is, on the ninth day of the eighth month of the ninth year of Wude (September 4, 626), the crown prince Li Shimin was the emperor in the Xiande Hall of the East Palace, which was for Tang Taizong, and granted amnesty to the world, and began his glorious career as emperor, and changed the Yuan Zhenguan on the first day of the first month of the second year of the throne (January 23, 627). During the reign of Taizong, the rule of culture was clear, and the martial arts were great, and the history was called "the rule of Zhenguan".

Xuanyuan calculated the heavenly machine through the heavens, and thought that if Yan Liyan wanted to prove the true immortal, it was better to prove the Bodhisattva fruit first, and the Buddha's heart was in Yan Liyan's divine consciousness, so he asked Yan Liyan to practice the five aggregates of emptiness Zen and cultivate the Arhat fruit.

After the change of Li Shimin's Xuanwu Gate, he was affected by the souls of his brothers day and night and could not sleep peacefully. Xuanyuan Sutra then entrusted his dream to him and taught him the Prajnaparamita Heart Sutra.

Yan Liyan made a vow to attain the Bodhisattva Fruit, to seek Mahayana Buddhism for all beings in Middle-earth, and to spread the wonderful truth of the Great Prajna.

Yan Liyan wrote to Tang Emperor Li Shimin many times, requesting to go to the place where the Buddha propagated the Dharma, which was also the Buddhist research center and Buddhist scripture collection center in the world at that time, Nalanda Temple in Tianzhu to seek the Dharma.

Li Shimin was entrusted by Xuanyuan to dream through heaven and allowed to travel west.

Guanzi Bodhisattva led the Buddha's decree to the lower realm for Yan Liyan to shave and receive ordination, and the Dharma name was established, and he was given a nine-ring tin staff, a purple gold bowl, and a brocade robe, and pointed him to the west.

Yan Liyan took Zhu Bajie and Long Xiaotian to the west to seek scriptures, and Xuanyuan Jingtian and the Daoist of the Guardian followed secretly.