"Remember, right?" Lu Hanyang poured beans from the bamboo tube this time, and he was ready to tell Li Er everything at once, anyway, he fought down this country, let him have fun with it, Li Er should be able to grasp the measurements.

Li Er's ability has been proven in history, so Lu Hanyang is ready to let him bear a little more. Instead of waiting for Li Er to hang up, he will give it to his son and grandson (Xiao Wu will not enter the palace, of course he is a grandson). Those guys have a bit of a reputation in history, but they're not good.

Li Zhi became Emperor Gaozong, which is very capable, but this guy has a soft temperament, and in the end, he lost the country and became Xiaowu. This guy Lu Hanyang feels unreliable, let alone Li Dan and the like in the back.

Of course, Li Longji, the guy who played the Anshi Rebellion for his wife, and then killed his wife to save the country, Lu Hanyang also looked down on him.

Therefore, Li Er is the best test subject, let this Tian Khan become another more powerful emperor, and then take this hundred battles of the early Tang Dynasty to open up, what can be achieved in the end!

So now that Li Er has written down the defense method of smallpox, Lu Hanyang is ready to take out a big killing weapon, although he doesn't know what nitric acid explosives, what TNT ratio and the like, after all, he is not a military fan.

But he still knows the compatibility of black powder, one sulfur, two nitrate, and three charcoal, but he can't be sure whether it is a pound of sulfur or one or two, but Li Er has to figure it out by himself, and he will know if he is fried according to these two configurations.

"Next, this thing I am talking about, you must be careful and careful, because this is completely different from those things before, and it belongs to something that hurts the heavens and the world!" Lu Hanyang solemnly told Li Er.

"What is it, the immortal is so solemn." Li Er asked.

"This seat calls it black powder, which is a by-product of the Taoist monks refining the outer dan, that is, the substandard product. But it has a powerful effect, and that is to explode! Lu Hanyang said.

"Explosion?" Li Er still couldn't understand the meaning of the explosion.

"This seat will show you what an explosion is!" The Explosive Talisman Lu Hanyang also survived, but he painted it after he came back.

"This is an explosion talisman seal, this seat lets you see what an explosion is!" As he spoke, Lu Hanyang took Li Er to a forest outside the apse.

"Sickness...... Go! The Exploding Talisman Seal turned directly into a red light and flew into the distance, and then fell into the woods.

"......Boom" A violent sound like thunder came, and a big tree was directly blown to pieces, and then countless fragments splattered up and shot out in all directions, leaving the entire forest high in a mess, and even many trees were directly shot through.

"This ......" The rice paper held by Li Er had already fallen to the ground at this time, but he didn't expect the so-called explosion to be such a scene!

"Sure enough, it hurts the heavens and the peace, if this black powder has this power, then the enemy's city walls, soldiers and horses can only be blown up directly." Although Li Er sighed at this power, there was a kind of blazing heat in his eyes, if this weapon was mastered by Datang, then Datang's country would definitely be immovable.

"Don't be blinded by this power, you should know that on the day when the powerful forces are overcome, even if you are here, you can't guarantee that you will be able to retreat in front of the natural heavenly might!" Lu Hanyang said.

"Immortal Chief, please tell me the recipe for this black powder!" Of course Li Er knows, but his idea is very simple, Lao Tzu has left you such a weapon, and you have been beaten by others to cry and cry for your mother, and you can't keep the country, so you deserve it.

"The formula, I don't remember it very clearly, anyway, one sulfur, two nitrates, three charcoal, sulfur is either a pound or a tael. Two taels of saltpeter and three taels of charcoal are all ground into powder and then mixed together. Then seal and wrap it, and leave the lead wrapped in black powder outside, and when you need to use it, you can ignite the lead with fire and throw it out. Lu Hanyang said.

"This ...... Xiao Ke made a note of it! Li Er said, and then quickly began to write. Although Lu Hanyang didn't remember the specific recipe for this kind of thing, which made Li Er a little speechless, but the other party was an immortal, and that kind of bursting talisman was much more convenient than a black powder weapon, so he wanted to open it.

"I don't know how to increase the power of black powder, but you can do your own research, and you can make a fuss about the things that are wrapped, just like those things that were splashed out just now, wood can penetrate these trees, so what about replacing it with iron pieces?" Lu Hanyang pointed out a direction.

"Xiao Ke can write it down first, this means that Aoshi can't miss a word!" Li Er wrote intently.

"Also, this seat tells you that this thing will explode when it sees fire, so remember that it needs to be protected from fire in the manufacturing workshop, and there must be no fire in the workshop! Not even a little spark! Lu Hanyang warned again.

"Even the gods have warned them again and again, this thing is indeed very dangerous. This is something to keep an eye on! Li Er made such a definition in his heart, and then wrote "It is strictly forbidden to fire candles, and no fire is allowed to appear in the workshop." ”

"Immortal Chief, is that enough?" Li Er's intentions are still unfinished, this time it is a big harvest, not only the horseshoe of the strong army, but also the two methods of treating the plague, and the mystery of condensing water into ice, and finally obtaining this kind of big killing weapon.

"What? Still want something good? Lu Hanyang asked.

"If these things that the Immortal Chief said can really be realized, then where else in the world can stump Datang! Under this piece of sky, I am destined to become its king! Li Er said confidently.

"What's so hard to get Datang? This really exists, for example, this seat, the gunpowder weapon is basically useless to this seat, of course, if you can research a gunpowder weapon to directly kill the entire people in Chang'an City, maybe this seat will retreat three points. Seeing Li Er so complacent, Lu Hanyang immediately poured cold water down.

"This ...... You're an immortal, this can't be counted! Li Er said embarrassedly.

"Forget it, I'll tell you something I'm not sure about again! This thing is called cement. Lu Hanyang didn't know the recipe for cement, but he knew that it was made by mixing limestone and clay.

"In the lime kiln, limestone and clay are crushed into powder and then fired in the kiln, and finally the cement should be obtained. You can add some other slag powder to it. "There are only three materials, the specific recipe of a few to many, Lu Hanyang said that he doesn't know, or you burn a few more kilns!

These two things are big killers, things that absolutely change the world.