Hearing Cheng Huaimo's shout, Zhang Nan also stood up, but as soon as he stood up, Zhang Nan felt that it was dark in front of him, and then his body fell down uncontrollably, and Li Eryan quickly helped Zhang Nan.

"Qingquan, are you okay, are you also hurt?" Li Er hurriedly asked.

If Li Shiji, Cheng Biting Jin and Zhang Nan are lost in this battle, then I am afraid that Li Er will not forgive himself in his life.

Zhang Nan was helped by Li Er, and after a while, he said: "The minister is fine, it's just that the blood was drawn a little too much, it's okay, just rest and rest, let's take a look at General Cheng first." ”

Hearing Zhang Nan say this, Li Er was relieved.

Zhang Nan walked in front of Cheng Yanjin in two steps, and then pasted Cheng Yanjin's forehead with his hand, it was really hot, even if there was no thermometer, Zhang Nan could guess that Cheng Yanjin's body temperature was definitely above thirty-eight degrees at this time.

Soon Zhang Nan swapped out fever-reducing patches and antipyretics, as well as some anti-inflammatory drugs, from the system.

"Come, Wymer, feed these pills to your father, and then stick this thing on your father's head." Seeing Zhang Nan take out those small things of different colors, Cheng Huaimo did not hesitate at all, quickly took a bowl of water, and then fed Cheng Yanjin to take it.

"Qingquan, what is this thing you are holding?" Li Er curiously picked up a capsule and asked.

"This is also a pill, have you forgotten it, Your Majesty?" Zhang Nan reminded that after being reminded by Zhang Nan like this, Li Ercai vaguely remembered that he seemed to have seen this thing.

After knowing that he had seen it, Li Er didn't ask any more.

It wasn't until Li Shiji was transfused with blood, and then gave Cheng Yanjin antipyretic medicine to clean up the wound, that Zhang Nan breathed a sigh of relief. The rest can only depend on whether the lives of two people are hard or not.

Li Shiji has lost too much blood, as long as he ensures that the wound does not bleed anymore and the blood is transfused, Zhang Nan feels that he should be able to save it. If Cheng bites the gold, Zhang Nan doesn't know, after all, the wisdom of the ancients cannot be underestimated.

Although ancient bows and arrows were not smeared with poison or anything written on them, in order to achieve the effect of killing the enemy, soldiers generally painted a kind of "gold juice" on the arrows.

This "gold juice" is not something else, it is a mixture of human and animal feces, so that if the arrow scratches the human body, it will also successfully infect the bacteria on the wound, the ancient disinfection efficiency is low, and there is no correct understanding of bacteria, generally encountered in this situation, it can only be treated as a fever, so the fatality rate is very high.

"Eh, by the way, why didn't I think of a tetanus vaccine? With this thing, it's not a problem at all. Zhang Nan suddenly remembered that if the wound is deep, he will be injected with tetanus vaccine when he arrives at the hospital.

Zhang Nan's sudden shout quickly attracted everyone's attention.

"Qingquan, what are you talking to yourself alone?" Li Er asked.

"Your Majesty, the minister suddenly thought of a special medicine to prevent the deterioration of General Cheng and General Li's wounds, and with this thing, the two generals will not have much of a problem." Zhang Nan said excitedly.

"Oh? There is also this kind of thing, take it out quickly, if the two of them are safe this time, Qingquan you are the first to work. Li Er couldn't help but be excited when he heard that Zhang Nan had something new to come out.

Because it turns out that every time Zhang Nan takes out something new, it is very useful.

Soon Zhang Nan came up with two tetanus vaccines, and the system was very perfect, and when exchanging drugs similar to vaccines, even the drugs for skin testing were ready.

Zhang Nan also tried hard to recall the skin test he did when he was vaccinated before, and then copied one side on the arms of the two generals according to the gourd, and soon a soybean-sized bag bulged out on both of their arms.

"Qingquan, what does this mean, why do I feel something under the skin of the two of them?" Li Er asked.

"This is called a skin test, it is an experiment that must be done before the vaccine is injected, if the person has obvious allergies after the skin test, then the vaccine cannot be injected, otherwise it will be fatal." Zhang Nan arrived.

"I didn't expect this medical path to be so deep, it's short-sighted, Qingquan, you really have a wide range of knowledge when you cross a door." Li Er said with emotion.

"Hey, so-so." Zhang Nan also smiled when he heard Li Er's praise.

Five minutes later, the two generals lying on the couch did not have obvious allergic reactions, and Zhang Nan was also very bold to give the two of them a needle, and when all this was done, Zhang Nan finally breathed a sigh of relief.

"Your Majesty, in my opinion, we might as well retreat now." Zhang Nan said suddenly. When Zhang Nan said this, Li Er's face was also stunned, and then he said: "Retreat, where to retreat?" ”

"Of course, we have retreated into the city, if Quangai Suwen sends a large army to besiege us at this time, it will be difficult for our remaining troops to break through again, and what General Cheng and General Li need most now is to recuperate, if there is no good environment, it is useless for us to make more efforts." Zhang Nan persuaded.

Although losing the battle and then retreating is tantamount to escaping, which is hard to hear, but in order to survive, what is the point of face?

Hearing Zhang Nan say this, Li Er also thought about it seriously, as Zhang Nan said, if Quangai Suwen attacked the city again at this time, the remaining forces of the Tang Dynasty would have no chance of winning at all, and even if they broke through, it would be an extremely heavy price.

And now Li Er can't afford to pay such a price at all.

After being silent for a long time, Li Er finally let go of his pride, and then said: "Withdraw, we can't let our soldiers shed blood in vain, and when we are sure that Zhijie and Mao Gong are safe, I will definitely get them back." ”

Li Er finally relented, Zhang Nan was also happy, what Zhang Nan was most afraid of now was that Li Er couldn't let go of his face, and then he would have to fight with Quangai Suwen, but fortunately, Li Er was not a person who couldn't listen to persuasion.

"Pass on my military order, the whole army will withdraw to Gyeongju to regroup, everyone travel lightly, be sure to hurry, discard all useless things, and start gathering towards the rear of the camp now." Li Er quickly gave an order, and Cheng Huaimo quickly stood up after hearing it, and quickly walked out of the tent to arrange.

"Put Zhijie and Mao Gong on the hot air balloon, let them go back first, I see that the hot air balloon is too big, and I can let Mao Gong bend his legs a little and lie in it. Send the two of them back to Gyeongju first, Cheongcheon, you follow me with the army, whether you can get off depends on this time. ”