No one expected that Huiying actually had a powerful crossbow hidden in the dungeon. What he didn't expect was that Huiying actually dared to shoot the prince of the Tang Dynasty directly.

"Young Master..."

Xue Rengui rushed forward with his horse, trying to block the arrow with his body, but unfortunately, Xue Rengui's speed was already slow, and this powerful crossbow was very powerful, which ordinary people could not block.

Li You regretted it at this time and should have brought Yan San here, but Li You did not bring Yan San here today.

At this critical moment, the person who just shouted that Li You was careful suddenly flashed in front of Li You and helped Li You block this fatal arrow.

After Li You saw the person coming clearly, he shouted happily: "Zhang Shuai...!"

That's right, the person who came is not someone else, the bad handsome Zhang Jing.

Seeing that Li You was fine, Zhang Jing smiled: "Your Highness King Qi, that villa and silver identity card were not given in vain... Zhang Jing gave you a life."

"Haha..." Zhang Jing's words made Li You laugh: "I didn't give it in vain... Thank you Zhang Shuai...!"

"In addition to me, the King of Qi also wants to thank Your Majesty. It was Your Majesty who asked me to protect Your Majesty... But I will not interfere in other matters!" After saying that, Zhang Jing glanced at the gray shadow below.

At this time, Li You also saw the gray shadow below and said, "Li You is not that bad yet... Li You can still handle some things..." After saying that, Li You immediately looked at Xue Rengui and shouted, "Brother-in-law... Let's kill... don't let go of any one, especially those gray shadows...!"

"No..." Xue Rengui waved the horse spear in his hand and pointed directly at Huiying and shouted: "Die... Charge..."

Three hundred cavalrymen came out together, and then Luo Jin's shield player followed him and killed him. A massacre began like this, and soon the dungeon in Chang'an was directly destroyed.

After the melee, Huiying died. After the war, Huang San, who stole the saltpeter ice, was also caught and killed. Everything went very smoothly. This dungeon was so vulnerable in front of Li You. Li You was also a little confused. Why is such a dungeon famous for being famous because it is not fierce at all.

Any duke can beat it down. Is it because Huiying has the handle of those dukes in his hands that he has been held by this gray shadow?

Li You didn't understand, but another strange thing was that in this dungeon, Li You strangely discovered that it was like a shell, with nothing valuable inside.

It is said that Huiying controls the secrets of the entire Chang'an nobles, but in Huiying's life, Li You found nothing. Not to mention the secrets of the nobles, Li You didn't even find the money for his usual money. At this time, Li You seemed to have thought about it.

There may be something wrong with this dungeon and that gray shadow.

Then Li You asked Xue Rengui to deal with the aftermath, and he followed Zhang Jing directly into the palace. Li You wanted to tell Li Shimin what happened here as soon as possible, and also let Li Shimin know that he had nothing to get.

....................................

It should be the early morning of the evening... At this time, the candlelight was still bright in Li Shimin's nectar hall.

Zhang Jing and Li You walked in together, while Li Shimin was still looking at the above call.

Seeing the two of them coming, Li Shimin hurriedly looked at Li You and asked, "You'er... saltpeter is not enough... Just now, officials from the Ministry of Works searched all over Chang'an and found that the saltpeter in Chang'an could only last for about one day. Is there any way to get saltpeter?"

"Saltpeter..." Li You thought for a moment and said, "Oh... Actually, we can boil salt..."

"Boil the salt..." Li Shimin immediately smiled and asked, "How to boil the salt?"

In fact, Li You had already looked at how to collect saltpeter last time. The book said that saltpeter in nature is often formed by decomposing nitrogen-containing organic substances in the soil under the action of bacteria, oxidizing into nitric acid and combining with potassium in the soil.

So whenever the autumn season is clear and cool, it usually precipitates out in the shape of a shell or salt flower, covering the ground and the foot of the wall, which is called ground frost. Especially in pigpens, stables, and toilets, there are many corners near walls.

The nitrogen sweeps out the soil block containing nitrate, puts it in a barrel, and soaks it in water. After filtering, the filtrate is boiled or dried to obtain saltpeter crystals.

Seeing Li Shimin's expectation, Li You quickly explained how to boil salt. While listening, Li Shimin wrote down the method of boil salt that Li You mentioned.

After finishing writing, Li Shimin immediately called Li Junxian and asked him to deliver the method of boiling salt to the Ministry of Works, and he would start boiling salt tonight.

After Li Junxian left, Li Shimin looked at Li You and laughed, "How is it... Didn't you find anything?"

After Li Shimin finished speaking, Li You was stunned, then looked at Li Shimin with some surprise and said, "Your Majesty, how did you know that I didn't find anything?"

"Haha..." Looking at Li You's surprised look, Li Shimin laughed: "You used to be in Chang'an, but now you have started to take care of things, but how long have you been back to Chang'an?

I have been checking this gray shadow for a long time, but this guy has too many clones and many places to hide. The dungeon of Pingkangfang is just one of them.

Now you know why this gray shadow, why did the imperial court take him down without a single time...!"

"So that's the case?" Li You finally realized that the so-called Huiying he killed this time may not Huiying at all. At best, it is just a substitute for Huiying.

"Haha..." Li Shimin smiled: "I originally wanted to remind you, but your purpose was to establish authority. It would be enough to level the dungeon of Pingkangfang... Of course, I also want to use this matter to tell you that Chang'an water is muddy...!"

"Thank you, Your Majesty..." Li You bowed slightly.

At this time, I heard Li Shimin say, "Okay, you go back first... take your people back too. Don't talk about it, your Xue Rengui, the more I look at you, the more I look at you...!"

Then Li Shimin waved his hand, and Li You bowed again and left the Ganlu Palace with Zhang Jing.

After leaving the Ganlu Palace, Li You glanced at Zhang Jing beside him and said with a smile: "I would like to thank Zhang Shuai this time. If it weren't for you, I would have rushed over foolishly. Now it has become a cold corpse...!"

"Whatever your highness says? These are His Majesty's will... If you want to thank him, Your Highness should thank His Majesty...!" Zhang Jing looked at Li You and said slightly.

But Li You sighed: "Is that true... If Your Majesty really cares about me, you should remind me not to go where I am...!"

"Your Highness...!" Zhang Jing wanted to say something, but at this time, Li You waved his hand and smiled, "I won't say it anymore, Zhang Shuai, I'll go back first. Today I'm really sleepy. I'm going to go back and have a good sleep."

"Okay... Your Highness, please leave first. I will help you with the subsequent matters. Don't worry... Even if Huiying is not dead, he will not hinder you..." Zhang Jing laughed.

....................................
Chapter completed!