Bi Liang got Li Yuan's order and went with several personal guards.

After a short time, he walked into the main hall with a middle-aged man who looked like a scholar.

Li Yuan looked at this person and said in a deep voice: "You are the Qin criminal sent by Emperor Yang Guang of Sui to hunt down?" Why did you come to Chang'an again now, and I heard that you want to defect to me, I don't know if it's true or not. ”

Looking at this person, an indifferent smile appeared on Li Yuan's face, as if he was completely unmoved. This kind of aura is still extremely strong, at least the people who came fell into silence, suspecting their calculations of waiting for the price to sell.

As if he understood the intentions of the people, Li Yuan smiled, and then said in a solemn voice: "Since you have come to Chang'an, it is my territory, if you still want to play any tricks here, you are just asking for your own death." ”

"There are some things that are indeed useful to me, and if you can give them willingly, I will not treat you badly. But if you have ulterior motives, don't blame me for being ruthless. ”

Hearing this, this person's expression changed slightly, and he couldn't imagine that Li Yuan was so decisive, and he would show such power when he saw him. Judging from his tone, he had no doubt about Li Yuan's murderous intent, if he had to use this to threaten him, it would only backfire.

The man slowly exhaled a breath of turbidity, saluted and said, "The grass people are willing to pay a visit to Your Majesty." As His Majesty said, the grass people have a recipe that they want to sacrifice to their Majesty, hoping that Your Majesty will use it to fight against strong enemies. ”

Li Yuan put on a look of sudden realization, and said in surprise: "What do you want to offer?" With such an effect, could it be that it is a divine weapon that is enough to sweep away thousands of armies? ”

Speaking of this, Gambe suddenly showed a proud look and said: "Although this thing is not a divine weapon, its effect is much greater, enough to be worthy of thousands of troops. ”

Obviously, he is very confident in gunpowder, and how can it be ineffective to drum up hot weapons in the era of cold weapons, and his words are also practical.

Faced with Gan Bei's confident appearance, Li Yuan was still unmoved, and his question before Gan Bei had answered, so he looked at it with that sharp gaze and put great pressure on him.

At this time, Gan Bei could be regarded as understanding that he was nothing in front of Li Yuan. If he forcibly tried to pretend to be forced, it would be tantamount to killing himself.

It was Ganbei who said honestly: "This thing is called gunpowder, but I found it when I was refining medicine, and I originally wanted to dedicate it to Yang Guang, the faint monarch, in exchange for credit, but I never thought that he would cross the river and tear down the bridge. ”

"After experimenting with the formula again, we sent someone to kill us, and the grass people took the opportunity to escape, but they were pursued by the faint king, so they could only go incognito and come to Your Majesty today."

After hearing these words, Li Yuan finally understood the cause and effect, and it turned out that this Gan Bei was a monk. and his colleagues discovered the gunpowder formula when refining medicine, and finally lost his wife in front of Yang Guang.

Although this move is extremely immoral, Li Yuan didn't feel that it was inappropriate, such an important thing, it would be more secure if one less person knew about it, Gan Bei escaped from Yang Guang's pursuit, and soon dedicated the formula to him?

Li Yuan smiled and said, "I see, I understand, since you want to offer this gunpowder recipe to me, don't delay, I am also curious, this thing is extremely powerful, how to make it......"

Li Yuan directly got to the point, he was already a little impatient, after all, this thing was related to the survival of the Tang Dynasty. He was even able to use this thing to turn the tables and sweep the world.

Although the first actual battle of gunpowder was not successful, Li Yuan still had great confidence. Luo Cheng was able to defeat Yang Lin in Yangzhou, which does not mean that he will be able to defeat Datang again.

There is no doubt that Li Yuan's words are not just an inquiry, but also an order. If Gambe continues to talk nonsense here, he will undoubtedly ask for his own hardship, and he doesn't want to suffer this unwarranted disaster.

Under Li Yuan's oppression, he was silent for a moment, and then bowed his hand and said: "The recipe is in the hearts of the grass people, and please ask Your Majesty and the ministers to write it at this moment." ”

Hearing this, Li Yuan nodded, looked at Bi Liang on the side, and said indifferently: "The formula is very important, it can't be easily leaked, Bi Aiqing should step back first." ”

Although he was still a little unwilling, under Li Yuan's order, Bi Liang didn't dare to refute it at all, so he had to give up his orders and leave the hall with his guards, leaving Gan Bei and Li Yuan among them.

The guards took the pen and ink, and Gan Bei leaned over to write, which was quickly completed and handed to Li Yuan by the guards. Looking at the recipe above, Li Yuan didn't know whether it was true or not, but he still had a way.

Slowly moving down, Li Yuan swept towards Gan Bei and said: "I am not Yang Guang, I will not do the matter of demolishing the bridge in the river, Aiqing can rest assured, I will not treat you badly." ”

"I only hear of this gunpowder, but I don't see its might. Since the recipe was brought by Aiqing, Aiqing is responsible for supervising the production, presumably Aiqing will not disappoint me! Li Yuan smiled with a smile.

Looking at Gan Bei with his eyes, Li Yuan continued: "When Aiqing makes the gunpowder, I will naturally not be disadvantaged. Now that Yan Yun is menacing, if I can defeat the enemy army, it will be regarded as a great achievement for Aiqing. ”

said a lot, Li Yuan did not say a direct reward, but set a target for Ganbei. If Gambi can't complete the task, what awaits him is not a reward, but a punishment.

Gan Bei obviously knew this key, and now that he had arrived in Chang'an, he had fallen into the hands of Li Yuan. It is obviously impossible to run away, so you can only do your best to do things for Li Yuan to save your life.

So Gan Bei could only take Li Yuan's big cake hard, and said: "If you want to think about Your Majesty's appreciation, Weichen will definitely do his best to repay Your Majesty's great kindness." ”

Anyway, the two of them had a wave of idle talk, and Li Yuan decided the matter.

However, such an important person, Li Yuan obviously can't let him go free. It was arranged for Ganbei to have a side hall, and at the same time there were hundreds of guards guarding it, which should be very safe.

Although Gambe, who understood his situation, was a little unhappy, he also dared to be angry and did not dare to speak. can only work honestly, hoping that Li Yuan will not be as shameless as Yang Guang, crossing the river and demolishing the bridge.

As Li Yuan said, he only heard of gunpowder by name, but not by its authority. Whether it can be used against Yan Yun's army will have to be known after he personally watches it.

If Gan Bei really does a good job, it is not impossible to keep him alone.

This gunpowder was originally discovered by Gan Bei and others, and it is naturally quite a lot of experience in making it at this moment. Coupled with Li Yuan's full support and a large supply of materials, things were quickly made.

Seeing the finished raw black powder, Gan Bei was also a little excited, that is, he asked people to inform Li Yuan of the news. He couldn't wait to prove how strong and unusual gunpowder was.

Li Yuan, who also attached great importance to gunpowder, hurried over after getting the news.

Like Ganbei, he is also full of expectations.