At first, seeing Jia Lu pouring gunpowder into the water, Guo Cheng only thought that Jia Lu was crazy.

But later he found out that Jia Lu actually used this trick to separate the sulfur and charcoal in the gunpowder, and Guo Cheng didn't know what to say for a while.

Seeing Jia Lu boiling out the saltpeter from the water again, Guo Cheng was almost shocked!

Now he finally understands why the emperor takes such a fancy to this little hairy child, and he is really a real person!

Jia Lu looked at the poor layer of saltpeter precipitated from the bottom of the pot and couldn't help but sneer in his heart: This group of officials can do such a thing in order to make money for themselves!

But I don't know how Wang Ziteng found it when he patrolled the border last year? How much real benefit did you get back?

The weapons in the arsenal were roughly tapped, and the rotten ones were recorded, registered, and destroyed.

Fortunately, the climate outside the Seychelles, where Xuande City is located, is dry, although those three-eyed guns have been rusted for decades, they are not too eye-catching, and they have recovered their former style with a little polishing.

This thing is simple and crude, and you can use it all the time as long as it doesn't blow up.

Jia Lu tried a few rounds, and the reconfigured black powder and fuse were still activating normally.

Xuande City originally had a quota of 2,000 soldiers, but Wang Jian only kept six or seven hundred people in order to be able to eat empty salaries, and he also let these soldiers plant a large piece of land in peacetime.

Because he didn't know Jia Lulai's intentions at first, he used the farmers in the villages in the city to gather seven or eight hundred people in a hurry, barely enough to gather 1,500 people, but there were really few of these people who could really fight.

After a while, he found that Jia Lu didn't seem to want to make a fuss about it, and he felt that he was familiar with Jia Lu's brotherly brother, so Wang Jian no longer hid it, and was still his own soil emperor, thinking about making money.

Garruk was really in no mood to bother with that.

casually asked Lao Qintou to eat wine twice, and everything came out.

Even Xuande City, a military powerhouse, is still like this, how good can the other military towns on the nine sides be?

However, these things are not in his charge, and Jia Lu did not think that he would investigate the corruption of the Dayu Dynasty military by himself, and he could change the status quo with a single piece of paper after returning to Beijing.

Is the prince stupid? He came back from a trip to the Nine Sides and didn't say anything, why?

Because what you say is also in vain.

Corruption in the army has long been a big net in the government and the opposition, and too many big fish and shrimp on the net are greedily sucking the flesh and blood of the border army.

Defeating one Wang Jian will not have a great impact on the whole situation, and if the entire net is defeated, it is estimated that many gentlemen in the court will be convicted, and it is difficult to say how many generals will be left in the nine sides to command.

He has a lot to do, such as writing letters to the girls in Shenjing to exchange feelings, such as riding horses around when he is fine, and feeling the folk customs of the northwest and the customs of the grassland.

For example, I can calm down and do my old job, research and research medicines.

Before antibiotics became widespread, the biggest casualties on the battlefield were not knives, guns or muskets, but wound infections after the war.

Instead of being limited by medical conditions during the war, an ordinary cold and fever can easily boil into pneumonia or something, and eventually kill people, Qingwen is the best example.

It is precisely because of this that they heard that Jia Lu was coming to the Nine Frontiers, and the girls were so relieved.

As the most famous in the antibiotic world, penicillin has been written in many crossings, making and purifying so easily.

But Jia Lu understood that before Penicillium was selected by modern industrial radiation, the yield was definitely a desperate number.

What's more, this output cannot be extracted by the ancient extraction process, and there are a lot of harmful substances in the mold culture liquid, which are definitely greasy to use without purification.

However, another broad-spectrum antibiotic that is simple and inexpensive to extract is different, and perhaps not many people have heard of its name - allicin.

The antibacterial ability of allicin is no worse than that of penicillin, and the types of antibacterial species are also wider.

Penicillin is only effective against bacteria and not against fungi, while allicin is one of the few antibiotics that can work against both bacteria and fungi.

And just mash the garlic and soak it in a highly concentrated spirit.

Although this antibiotic was mostly used to make veterinary drugs in later generations, it is also a miracle medicine to be able to give people this year.

Of course, allicin is made first to be prepared, in case you have a fever and pneumonia, you can top it first.

If there is really no credit in the future, then consider whether to dedicate this recipe to the imperial court.

Jia Lu did not forget that it was precisely because of what he told Li Yu that he had a policy towards the Mongols with carrots in one hand and sticks in the other.

He still paid attention to the news and customs of the Mongols whenever he had the opportunity.

When he knew that Xuande City was more than ten miles away, there was a saltwater lake called Weininghai, and Jia Lu's trajectory also expanded.

Then he had an idea, thinking that his compressed military rations could solve part of the problem of military ration transportation, so why not solve the problem of drinking water?

Compared with food security, the safety of water during the march and war is actually more important.

A person who does not eat for three days will not die of hunger, and will definitely die if he does not drink water for three days.

In addition, the ancestors of the Han people have the habit of drinking boiled water, and when they are marching and fighting, they do not have the conditions to go to the cauldron to boil hot water.

Therefore, from time to time, a large number of soldiers in the army have collective stomach troubles, which is definitely a matter that greatly affects combat effectiveness.

The water filter is also simple to make, and it just so happens that the carbon in the substandard gunpowder comes in handy.

Find a log and hollow it out, leave a hole below to drain the water, and put small stones, coarse sand, fine sand, charcoal and several layers of fine silk cloth in the log from top to bottom, and a simple water filter device is done.

Moreover, the filter cartridge can be replaced at any time, which is convenient and easy to carry, which is really a must-have artifact for home travel.

I don't feel that spring goes to autumn, and it's winter again.

Winter in Saibei comes more than a month earlier than in Shenjing.

On this day, I was writing a letter to Keqing in the room, and suddenly I heard a mess outside.

Jia Lu put down his pen and inquired, it turned out that the Mongols were coming!

For a moment there was a panic in the city.

Jia Lu and Guo Cheng climbed the city wall, only to see that there were about 3,000 Mongols riding on horses with bows and arrows in their hands and scimitars at their waists.

Thousands of horses seemed to feel the pressure of the time before a big battle, and their restless hooves plowed the ground, kicking up a cloud of smoke and dust.

I have to say that the momentum is really terrifying.

"Childe, there are many Mongolians, I'm afraid it will be difficult to hold on, let's retreat to Datong first and then make a theory!"

Although Guo Cheng, the inner guard, has a good ability, he can't help but be a little timid when he sees the Mongol soldiers approaching the city at this moment.

In front of the Mongols who were skilled in riding, he didn't have a lot of control over me by himself, let alone with a Jia Lu who had no martial arts.

"I can't run! The north gate was also blocked by the Tartar cavalry! We're the turtles in the urn now! There was a hint of despair in Wang Jian's voice.

"Run? Why run? I have come to the border by order, and the city is here! Knowing that there was no way out, Jia Lu said stubbornly.

"What's the panic, and we're guarding the city! Can they still jump up the walls on horseback? Don't forget that the Mongols didn't have siege engines! ”

Before the words were spoken, a group of ragged men in the distance slowly pushed a siege vehicle and a ladder almost two feet high under the urging of the Mongols.

A Mongol general at the head of the horse bent his bow and arrow, and with a whoosh, a feathered arrow burst through the air and shot straight at the door of Jialu.