Li Shimin returned to Chang'an, still in the Chengqian Palace, and heard the exclamation of his wife, Changsun, beside him.

He looked up and saw Guanyin covering her mouth and looking over in surprise.

Beside him, there was an extra bag, a thick book.

"Erlang, these are...... Vomit. ”

Before he finished his sentence, the eldest grandson retched, bent over and wanted to vomit, and covered his chest with his hands.

"Guanyin!"

Li Shimin hurriedly sat up and supported her, and his palm ran down her back to let her breathe smoothly.

The eldest grandson smiled apologetically at him, "The concubine is fine, I don't know why I have been a little uncomfortable in the past two days, Erlang don't worry." ”

"How can I not worry about you? Just right! ”

Li Shimin remembered, reached out and took the "Barefoot Doctor's Handbook", and handed her the book with a happy face:

"This is a medical book I received from a man of God, and it contains hundreds of diseases and cures...... There is also this bag, this is a tael written in the book, you will have someone weigh it carefully later, see how many taels! ”

The eldest grandson smiled: "Where is Erlang in a hurry?" The concubine was about to ask you, why did this book and this bag of things suddenly appear on the bed? Also, you just came back from outside in a hurry to sleep, are you sick? ”

She had been scared twice, once when he had come back from outside and had fallen asleep, and once when she had seen something suddenly appear on the bed.

Li Shimin looked a little embarrassed, held her hand and said apologetically: "Don't tell me about this, I'll tell you later, listen to me first, these corns still have this book......"

After the explanation, Li Shimin immediately called the maid in, changed into palace clothes and went to see his father.

After sending him away, the eldest grandson sat on the bed and looked through the medical book, which was extremely valued by her husband, to see what prescriptions were recorded in it.

"Huh?"

She soon realized that something was wrong, that the book was not read from the right, and that the words in it were very different from those of today, with symbolic separations between each paragraph, and many strange words that she did not recognize.

But even so, she can still roughly understand the content of the book.

The more she looked, the more surprised she became.

The details of the herbs, the meticulousness of the various diseases, the variety of diseases, and the breadth of the contents were far beyond the books she had known in the past.

"Where did Jiro ...... from?"

The eldest grandson was full of surprise, "Godman? What is a man of God? ”

Although she couldn't figure it out, she didn't dare to slack off, put away the medical book, took out the one or two corn seeds and went outside, and immediately instructed the personal maid:

"Go get a scale, and in addition, send someone to inform my brother and ask him to come to Chengde Palace!"

"By the Princess's orders."

……

Li Shimin rode a horse with white hooves into the inner garden of Taiji Palace, and before he walked to the Hongwen Palace, he had a sense of foreboding in his heart.

Outside the Hongwen Palace, by the mountain pool, a palace eunuch was leading a horse to graze grass by the water, and after seeing him, the eunuch hurriedly showed an embarrassing smile to him.

"Whose horse is this?"

Li Shimin grabbed the reins of the white hoof, told the horse to stop, and asked him.

Those who could ride horses into the inner garden of Taiji Palace, except for the four of them, only the emergency military situation could directly ride into the palace to report to Li Yuan.

Now that his brother is in Gaodun, Li Zhiyun has not yet taken charge of the army, and he never rides a horse when he enters the palace, so this horse is ......

"The king of Hui Qin is a horse ridden by a general in armor." The eunuch laughed with him, "The slave and maid really can't pull it, so this beast can only graze ......"

Li Shimin didn't listen to his words, waved his horsewhip, and hurried towards the Hongwen Palace.

Xu is sound of horses' hooves alarmed the people inside, and as soon as Li Shimin tied the horse rope, a eunuch walked out of it and announced him to enter the palace.

Li Shimin quickly walked into the hall, only to see that in the dim hall, his father Li Yuan was sitting cross-legged on the couch, Pei Lin was next to him, there were wine and food on the table, accompanied by four or five ministers with ugly faces, and a general in the army with bloody armor was kneeling and reporting the military situation.

"Jiro!!"

Li Yuan hurriedly shouted at him, and without waiting for Li Shimin to ask, he said hatefully: "Liu Wenjing and Yin Kaishan discussed leading the troops out of the city to fight, and they were defeated after being surrounded by Xue Ju, and now part of the army has returned to the city, and part of it has fled towards Chang'an, and your brother's life and death are unknown, this is ...... How did Liu Wenjing command the troops!! ”

The army fled to Chang'an!

One sentence made several ministers' faces a little ugly.

Gaojaw is not far from Chang'an, Xue Ju's cavalry has more than 10,000 people, and he can reach Chang'an in two or three days and nights......

I'm afraid I won't have to change my name again.

"Father!"

Li Shimin's face remained unchanged, he stood and bowed to Li Yuan, and said in a deep voice: "Xue Ju may pursue my remnants of the Tang Dynasty, but he will never dare to come to Chang'an!" ”

"Why is that?" Li Yuan asked his second son.

"There are three reasons, one of which is that Gaojaw and Jingzhou are not broken, of which Jingzhou is located in the rear of Xue Ju's army, which is stuck in the grain road, so that it does not dare to go deep alone. Second, Ningzhou and Gaojaw are horns of each other, and the assassin Shi Hu Yan guards Ningzhou City, which can also deter its grain route, which is also what Erchen said before, just defend Gaojaw, and then attack when Xue Ju's troops are tired and retreating! ”

"Alas, my son has such an opinion...... It's time for you to lead the troops that day. ”

Li Yuan regretted it too late, and asked again: "What about the third?" ”

"The third is my Chang'an City, Chang'an is the capital, last year we claimed to have 200,000 troops, Xue Ju can't figure out the details of my Tang army, and he will not dare to attack with the whole army!"

Li Shimin said it categorically, which made Li Yuan's flustered heart gradually settle down, and praised the ministers with a smile: "This is my Erlang!" ”

The ministers praised one after another.

Li Yuan asked about countermeasures again.

Li Shimin said again: "Today's plan, it is advisable to send troops as soon as possible!" ”

"Still going to send troops?!"

"Yes, Father...... Sending troops to aid Gaoqi and Jingzhou, these two cities cannot be occupied by Xue Ju, otherwise his eastward march will be unimpeded, and our army will have no advantage! In addition, sending troops can also rein in the rout army and bring back the prince. ”

Li Shimin made a detailed analysis.

"The prince's life and death are uncertain...... It's time to send troops. ”

Li Yuan hesitated, "But Chang'an ......"

"Chang'an is defended by the defeated army!"

Li Yuan was even more hesitant, Erlang had a thorough plan, he couldn't find a flaw, but he was indecisive.

Pei Lin on the side said: "If the prince is killed in the chaos......"

Li Shimin glanced at him, and Pei Lin dared to say this in front of his father, if it were someone else, his father would have been angry.

Pei Lian's words were actually against sending troops.

“……”

Li Yuan pondered for a long time, looked at his tall and handsome second son, and suddenly said a sentence: "Erlang, if your brother is killed by Xue Ju, I will make you the crown prince!" ”

Li Shimin's heart was shocked, he didn't dare to think about it, and hurriedly comforted: "Father, my brother is the prince of the Tang Dynasty, and he has the support of his father's mandate, so he will be fine!" ”

Li Yuan smiled, "Okay, I will appoint Erlang as the generalissimo to replace the crown prince in command of the war with Xue Ju!" ”

"Erchen takes orders!"

Li Shimin knelt down to accept the position of generalissimo and was fully responsible for the war in Longxi.

"Erlang, this time you go on an expedition, you must find your brother...... Hold Gaojaw and Jingzhou, don't go out of the city to fight Xue Ju again, I will send someone to contact Li Liang in Liangzhou, make him the king of Liang, let him harass Xue Ju from the west, and force him to withdraw his army. ”

"Father's plan is really wonderful!"

Li Shimin complimented his father, Li Yuan laughed, and ordered him to go back and quickly lead the remaining troops of Chang'an to aid Gaoqi.

Li Shimin glanced at Pei Lin and did not leave immediately, so he had time to ask the kneeling general:

"What's your name? Can you know why the marshal and the general manager of the march decided to lead the army into battle? ”

"The last general, Lu Shiheng, I don't know why I want to lead the army out of the city to fight."

Lu Shiheng replied again: "I only know that not long ago, many people in the army suddenly had a fever, sweating, unable to move, serious and even fainted, and a large number of soldiers fell ill, fortunately ......."

"What?!"

Li Yuan's face changed in shock, and Pei Lin on the side shouted even more: "Your Majesty, it's an epidemic, hurry, come quickly, drag him out and lock him up...... Your Majesty, go away! ”

Several ministers also rushed to flee.

The disease that Lu Shiheng said is clearly a plague of disasters from heaven!

They all fled one after another, and even the eunuchs were so frightened that they didn't dare to approach, but Li Shimin only covered his mouth and nose with his sleeves and asked Lu Shiheng, who had an ugly face:

"Did the patient first have chills, trembling teeth, muscle and bone aches, and then fever and sweating?"

Lu Shiheng's face was surprised, "Exactly, His Royal Highness King Qin, how do you know?" ”

"It's malaria!"

Li Shimin explained to Li Yuan, who was hiding: "Malaria is transmitted by mosquito bites, and my father has recently paid attention to repelling mosquitoes, so he can be safe and sound!" ”

Li Yuan was surprised: "How did Erlang know?" ”

"Uh, son... It was accidentally seen from an ancient book...... Father, the son went first! ”

Li Shimin didn't dare to stay for a long time, so he motioned to Lu Shiheng to follow him and went out of the Hongwen Hall together.

"Thank you, Your Royal Highness King Qin!"

Lu Shiheng was very grateful, he actually didn't have the epidemic, but when he came to report the military situation, he rashly rushed into the Son of Heaven, if it wasn't for the King of Qin to relieve the siege, he didn't know how to be punished.

Li Shimin smiled slightly, "Lone is the marshal, leading the army to meet Xue Ju, do you dare to fight against him again?" ”

"King Qin has an order, dare not obey his fate?"

Lu Shiheng knelt down on one knee and saluted the King of Qin.

"Okay, hurry up, what did you hold before?"

The two of them went out of the Hongwen Palace, rode their respective horses, and went out of the Taiji Palace together.