After recording the explosion data, Chen Xu took Sun Shujiong and the two back to the position of the carriage.

At this time, nearly 300 soldiers wearing various types of armor have gathered nearby, as well as countless personal guards with tigers and bears, as well as the people of Xianyang, the warlocks of the Fang family, the dignitaries, the rich second generation of officials and the second generation who watched the excitement, and there were thousands of people, old and young, men, women and women, but at this time they were all in chaos, most of the horses were disturbed by the sound and fire generated by the explosion, and the people on the river beach outside the entire east gate were shouting and neighing and chaotic.

Chen Xu smiled bitterly and climbed into the carriage and ordered to go back to the Academy of Sciences first.

After Chen Xu and his group walked away, the soldiers and people who came to check the situation flocked to the place where Chen Xu had fired the cannon, and then looked at the row of big craters that had been blown out on the bank of the river and began to discuss and make noise in horror.

"Yes, this is definitely the Taiyi Divine Thunder, I have seen it at the Taiyi Divine Monument in Wancheng!" A warlock shouted in horror.

"It's not like it, it is said that the power of Taiyi Divine Thunder is much greater than this, and it can blow out a large pit with a radius of dozens of zhang!" The other monk shook his head a little confusedly.

"You only know one but you don't know the other, that day, Wancheng's blow to Taiyi Divine Thunder was an immortal technique performed by Taiyi Immortal Venerable, and it was naturally powerful, Qinghe Hou was just a disciple of Taiyi Immortal Venerable, and the power released was not enough, naturally it was not yet true or the cultivation time was not enough, given time, I believe that Qinghe Marquis would definitely be able to perform the immortal art that destroyed the world and destroyed the world!"

"This is true, but looking at the situation in front of me, I'm afraid that Qinghe Hou is already about to succeed, seven consecutive blows of divine thunder, I and other ordinary people will be blown into powder directly, and the power is greater, if it falls on the head of Xianyang City, I am afraid that the city wall will be blown down!"

"Yes, it's terrifying, this is the place where the divine thunder landed, I'd better worship sincerely!" A warlock said, slightly frightened.

"Not bad, not bad, hurry up and notify the manpower, arrange three livestock melons and fruits, and we will sincerely worship and have a little fairy spirit~!"

Under the commotion, many people knelt directly on the ground and kowtowed to the seven mud pits that were blown out, and some people instructed the servants to go back to prepare three animals and fruits and prepare incense cases, and to solemnly worship the gods and thunders.

"There is a Taiyi Divine Monument in Wancheng, and I am a Jingshi in Xianyang, how can I fall behind!" A wealthy merchant turned his head and instructed his servants, "Hurry up and find the craftsman and the Xuanshi, and a three-zhang high stone tablet will be erected here, and the disciples of Taiyi Immortal Venerable will be written to perform divine thunder!" ”

"Not bad, yes, but how can this matter allow you to monopolize the immortal fate alone, I will also contribute!" A few wealthy businessmen jumped out of the crowd.

It is true that the status of businessmen is low, but businessmen have been rich since ancient times, so after someone took the lead, many businessmen who came to see the excitement felt that there was an opportunity to take advantage of it, and if they could spend a little money and Qinghe Hou, and Taiyi Xianzun, and the disciples of the Xianjia family, this kind of opportunity will not be missed no matter what, so under the noise, a group of businessmen quickly reached a simple agreement, not only to erect a monument, but also to build a hundred zhang long stone embankment and altar to protect these mud pits for the people of Xianyang to worship and worship, After it spread, it also let the people of the world see, Taiyi Shenlei not only appeared in Wancheng, but also appeared in Xianyang, and seven blows in a row, killing countless evil spirits and evil ghosts, Xianyang City has been blessed by the immortal family since then, and the house must be safe.

At this time, Chen Xu returned to the Academy of Sciences in a good way, comparing the test results recorded by Sun Shujiong, and after comparison, several kinds of gunpowder with insufficient power were eliminated, leaving only three kinds of gunpowder production formulas, one is to use egg white as a coagulant, one is to use oil as a coagulant, and one is to use tung oil as a coagulant.

According to the effect of the test just now, the effect of using egg white seems to be better, but after a short thought, Chen Xu eliminated egg white.

The effect is indeed a little better, and eggs seem to be a little cheaper than tung oil, but eggs are not resistant to storage and transportation, and as a high-protein food, ordinary farmers are not enough to eat, if once used to make gunpowder, and after the emperor knows, I am afraid that the people of the world will not have eggs to eat, a decree will bring not benefits to the people but disasters, and raising chickens may also become a very heavy burden for farmers.

In this era when the population is not enough food, and there are many wild beasts such as weasels and rats, the success rate of raising chickens is not high.

Fat is found in many animals, lard, butter and mutton fat can be used, the yield is much larger than eggs, and the source is more stable, the boiling and refining methods are also simple, can be tentatively used as the basic formula.

And tung oil in this era all rely on wild oil tung fruit pressing, the yield is not high, and tea oil can not be promoted on a large scale, but as a cash crop can be planted in most parts of the country, and as long as the fruit is hung after planting, it will almost become a cash cow, you can pick fruits for money every year, this is also a kind of sideline once and for all, the cost is much lower than raising chickens, cattle and sheep, and the biggest advantage is that it is convenient to store and transport, if you want to manufacture gunpowder on a large scale, tung oil is the best choice.

So Chen Xu established the formula of gunpowder, and let the two dumb slaves all use tung oil as the coagulant of gunpowder in the future to start making.

Sulfur has been there since ancient times, it is also a kind of traditional Chinese medicine, the natural state of sulfur is in some copper-iron ore and volcanoes, and it is not less to arrange people to get it every year, and what is lacking is saltpeter, although the cave in Qinghe Town produces nitrate, but let people sweep out the nitrate soil inside and then melt water to boil, plus there is a small puddle inside, but it only gets a hundred catties for more than half a year, and twenty or thirty catties are used up in Wancheng, and the rest can only make a hundred catties of gunpowder at most, It is impossible to use it on a large scale on the battlefield, and it can only be used as a technical reserve first, and then it can be mass-produced after finding saltpeter mines.

However, with these successfully made gunpowder, you can make a handful of earth guns first.

"Come on, help me find Director Zhao!" Chen Xu commanded outside the gunpowder laboratory.

"Huh~" A guard guarding the door turned around and left, and after more than ten minutes, Zhao Qing came in a hurry.

"Master Hou, what did you call me?" Zhao Qing stood at the door of the gunpowder laboratory and bowed.

"Director Zhao come in! There's something I want you to help me find! Chen Xu turned around and called Zhao Qing in, then pointed to the white crystalline powder in a jar and said, "You arrange someone to help me find this saltpeter, the more the better!" ”

"Master Hou, isn't this just salt?" Zhao Qing glanced at it, then dipped some of his fingers into his mouth and sent them to his mouth.

"Phew! If it's not salt, it's bitter! As soon as he entered, Zhao Qing spit out, and his face began to distort.

"I've already said it, it's called nitrate, not salt!" Chen Xu said with a twitch of cheeks.

Zhao Qing said with a bitter face: "Master Hou, this thing is almost exactly the same as salt, if you want to find it, how can you be sure, I'm afraid you can't just taste it with your mouth!" ”

"Nature can't just taste with your mouth, there are too many things similar to salt in nature, and the bitter taste is not all nitrate, in fact, this kind of nitrate is everywhere, stables, pigsties, cattle pens, saline-alkali land in the dry season in autumn and winter, it will condense a layer of white powder, the main ingredient is this nitrate, you can get some by boiling salt, but it is not pure, you better help me find a saltpeter mine, I tell you the way to identify, is to burn it with charcoal, I will test it for you!"

Chen Xu dug some out of the jar with a spoon and walked out of the laboratory, came to the stove in the office, poured the powder in the spoon into the stove, and with a pop, a fierce purple flame rose from the fire.

"See, this saltpeter will burn violently when poured into a high-temperature carbon furnace and is a purple flame, this is the easiest way to identify, and other similar things generally don't have this situation!"

"I see, as long as there is a way to discern it, don't worry, Master Hou, I will arrange it immediately!" Zhao Qing arched his hand and said.

"By the way, this saltpeter is very explosive, don't use metal tools to dig, storage and transportation must be tied firmly with clay pots and wooden boxes, can not collide violently, let alone meet fire, I heard that in Hanzhong and Bajun Shu County Qianzhong have this thing produced, you slowly arrange people to inquire, some local alchemy monks may know, mainly looking for some low-temperature caves, these are what I found in the cave where Qinghe wine is stored in Qinghe Town, this matter is not urgent, after the beginning of spring, it is okay to look for it slowly, but it must be found!" Chen Xu advised.

"Master Hou, don't worry, as long as I have it, I will definitely find it!" Zhao Qing arched his hand and said.

"Well, by the way, there is also a lot of sulfur and tung oil, and people have to be arranged!"

"Yes, my subordinates will arrange it!"

"Master Hou, Your Majesty has summoned you to the palace!" Just as Zhao Qing left on the front foot, a palace man hurriedly came with an edict in his hand.

Chen Xu guessed that it might have been caused by his own experiment with a bomb outside the city, and this matter had to be explained to Qin Shi Huang, otherwise it would not be good to cause the emperor's panic and suspicion, so he cleaned up and followed the palace people to the palace in a car.

Since the last marriage failed and was rejected by the Marquis of Qinghe with the Dafa of pretending to be sick, Qin Shi Huang was depressed and cut down the three clans of Ao Ping in one go, and then did not summon Chen Xu into the palace during this time, and Chen Xu recovered from his serious illness and did not go to the court for half a month, so during this time Chen Xu seemed to suddenly disappear from Xianyang, and some princes and princes thought that Chen Xu had fallen out of favor, and some people began to speculate secretly, and gradually some gossip appeared.

However, today Chen Xu released seven Taiyi Divine Thunders outside the city in a row, blowing up the entire Xianyang City at once.

Qinghe Hou is still the mysterious Qinghe Hou, the identity of the immortal family's disciple once again stimulated everyone's hearts, as long as he is still in Xianyang, no one can doubt his special status.

Therefore, the news that Chen Xu was summoned to the palace by the emperor again spread quickly, no matter what kind of thoughts and opinions he had on him, he could not ignore his existence, it turned out that the emperor had not forgotten this immortal disciple.