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Two days later, several of Li Zicheng's personal soldiers left behind in the rear finally arrived in Kadang City, and on everyone's horseback, in addition to a small amount of dry food and water, there were two conspicuous sacks.

Entering the city, these pro-soldiers ignored it, and came directly to the camp to meet Li Zicheng, "My subordinates knock on the governor!" ”

"Get up!" Li Zicheng smiled, let them pour their own hot tea, and said, "How is it, it's done?" ”

"It's done, it's done," the soldiers put the sack behind them in front of Li Zicheng, "Governor, all the glass mirrors in Xining and Lanzhou are here, there are more than 800 faces!" ”

"Good fellows, there are so many?" Li Zicheng also lamented the creativity of industry, but a small production factory can make so many glass mirrors, but, fortunately, it was not transported to Jingshi and Jiangnan for sale, "How about it, have you tried it?" ”

"I have tried, and indeed as the Governor said," said one of the soldiers, looking at him in amazement, "if each person holds up a glass mirror and concentrates the sunlight, it will make the thick log of the bowl burn......

"Oh?" Li Zicheng was overjoyed, he had just heard this kind of legend, and he had the mentality of giving it a try, but he didn't expect it to succeed.

This time Lin Dan Khan's raid on Kadang City, he was indeed taken aback, the first few times to deal with Bayar, Mai Li Gan, these Mongolian remnants, has been exhausted, and Lin Dan Khan is the Great Khan of the whole Mongols, although the strength is damaged, no longer the courage of the Mongol Empire, but the emaciated camel is bigger than a horse, Lin Dan Khan's strength, the number of cavalry, is by no means comparable to the second-class cripples of the nomadic people such as Bayar and Mailigan.

In desperation, Li Zicheng was forced to find another way, and then the story of Archimedes came to mind.

The pro-soldier Xiaoqi officer was afraid that Li Zicheng would not believe it, so he hurriedly said: "Governor, we have tried several times, and the results are all the same!" "If they can defeat the Mongols this time, their military exploits should not be able to escape, maybe the Metropolitan Governor's personal army will be expanded, and he may be able to rise to the rank of chief flag officer!

How did Li Zicheng not understand his thoughts? As a pro-soldier, although he runs weekdays, there are not many opportunities to go to the battlefield, such military merits, no wonder the pro-soldiers are full of expectations, "Haha, if the glass mirror can help our army to inflict heavy losses on the Mongols, your military exploits are naturally indispensable!" ”

"Thank you, Dadu!"

"You don't need to thank me, you have to thank the Mongols," Li Zicheng saw that his soldiers were staring at each other, and they all looked confused, so he smiled and said: "If it weren't for the Mongols attacking Kadang City, how would you have such a meritorious opportunity?" ”

"Huh?" The soldiers were stunned for a moment, a large number of Mongols attacked, Kadang City was in danger, and when they arrived at the Metropolitan Governor, it was an opportunity for themselves and others to make meritorious contributions, and they were grateful to the Mongols...... This ease of the Grand Governor...... They were so impressed that they threw themselves to the ground, "thanks to the Mongols, if they had the chance, their subordinates would cut off their heads, and then, and then burn them, and bury their bones properly!" ”

In their hearts, the soldiers had already scolded the ancestors of the Mongols for eighteen generations, but they didn't dare to explode in front of Li Zicheng, which was the most elegant word they could come up with.

"Okay, you guys go down and rest first, don't leak secrets for the time being!" Li Zicheng asked the soldiers to leave the glass mirror, he had to personally test the effect, although the glass mirror can concentrate light and concentrate heat, but the distance is also very important, the reflected light point is within one meter, and within 100 meters, the effect is absolutely different.

The Mongols had to go to the east to test outside the western city, but more than 800 glass mirrors required a large number of people, even if each person held two glass mirrors, it would take more than 400 people.

There is also a problem, that is, secrecy, glass mirror is a civilian commodity, the future of the people, will definitely gather a lot, if as a secret weapon leaked, it is difficult to ensure that there will be no incident.

After thinking about it, Li Zicheng decided to let Li Guobu's soldiers participate in the experiment, not because he particularly trusted Li Guo, but because only Li Guobu could concentrate so many soldiers.

Although Zhou Bin has five hundred soldiers, they have to protect Kadang City, and now the heavy responsibility of defending Kadang City mainly falls on them.

And the Song Wen Department in the city, this time the casualties were heavy, a thousand households of auxiliary soldiers, just the death is close to sixty percent, and seven hundred households of soldiers, the death is also more than half, the living gunners, together with Song Wen's personal soldiers, almost everyone is injured, even if they are treated, the proportion of disabled will not be too small.

Thinking of this, Li Zicheng couldn't help but scold Lin Dan Khan in his heart, he must let him compensate for the losses of the Heavenly Mandate Army, but he must first defeat Lin Dan Khan.

Li Zicheng returned to reality and immediately asked his own soldiers to pass the order, and asked Li Guo to take four hundred soldiers to Dongchengtou immediately.

When Li Guo rushed to Dongcheng, Li Zicheng had made all the preparations, and the soldiers who were originally stationed in Dongcheng were also sent away by Li Zicheng.

Li Zicheng personally taught the soldiers how to use the glass mirror, and then began to distribute the glass mirror, a total of 822 glass mirrors, which required 411 soldiers.

At this time, it was the end of the hour, and the sunlight was very full, Li Zicheng asked these soldiers to stand at the head of the city, and then concentrated the sunlight reflected by the mirror on a dead tree fifty steps below the city.

At first, the dead tree did not change, but when all the reflected sunlight slowly concentrated at the same point, white smoke instantly rose from the dead tree, much faster than grilling with a fire fold.

The white smoke became thicker and thicker, but in the time of half soaking in urine, a faint fire appeared on the dead tree, and the next moment, the flames burst up, which could be seen with the naked eye, until the middle of the dead tree was burned into black charcoal......

Li Zicheng was overjoyed in his heart, and sure enough, as his own soldiers said, it seems that this secret weapon can really play an unexpected role on the battlefield.

In order to test the best effect, Li Zicheng is constantly looking for new targets, moving the light points reflected by the mirror to the distance, and the solar energy is "inexhaustible and inexhaustible", unlike ordinary firearms, which will be used a little less!

When the light reflected by the mirror is 500 steps away, and the grass on the ground can be smoky, Li Zicheng thinks that it is okay, at this distance, if it shines into the eyes of the Mongols......

Li Guo was stunned, he didn't expect that the glass mirror used by women to dress up would become a deadly weapon to attack the enemy in the hands of the Dadu Governor! This Metropolitan Governor ...... He suddenly felt that his second uncle seemed to be getting stranger and stranger!

Fortunately, he is still his second uncle and his own governor!

Although Li Guo did not participate in the defense of Kadang City in the past few days, he has been worried, ready to fight hand-to-hand with the Mongols who attacked the city, Zhou Bin's department only has five hundred gunmen to arrive in Kadang City, if the follow-up reinforcements can not come as soon as possible, sooner or later there will be a dangerous situation.

Today's Events...... Li Guo is still worried, but he is worried about himself.

If the Mongols were completely annihilated under the city of Kadang, how would he still make meritorious contributions? finally got the opportunity to play alone, and he was ready to compete with Liu Yunshui, but now it seems that he is probably going to be disappointed.

However, compared with meritorious service, Li Guo still attaches more importance to the victory of the Heavenly Mandate Army, which has too many enemies and is extremely powerful, and only by constantly defeating these powerful enemies can the Heavenly Mandate Army survive and usher in various opportunities and eventually develop.

The glass mirror of the Grand Governor is a chance to usher in victory, and this is an opportunity that no one can imagine, except for the Grand Governor himself!

Li Guo leaned over to Li Zicheng and said in a low voice: "Governor, it's almost noon now, and the sun is sufficient, why don't we go to Xichengtou to try?" Let these Mongols know that the Mandate of Heaven is not something they can afford to mess with......"

"That's fine," Li Zicheng also wanted to see the effect of the glass mirror, if the sunlight reflected by the glass mirror could kill a large number of Mongols, wouldn't the history of the war in the future be greatly rewritten? "However, Xichengtou is still fighting, right? If we flood into the city, we will be the target of the Mongols' arrows! ”

"Grand Duke, the battle at Xichengtou has ended, the Mongols have withdrawn, and now the sporadic gunfire is the gunners shooting the wounded Mongol soldiers under the city......

"In that case, let's go to the city and have a look!" Li Zicheng said in his heart, the Mongols withdrew, and the city would not leave any follow-up troops, but it was good to go to the field to see, maybe there were unexpected gains, and after explaining the strict secrecy of the soldiers, he rushed to the west with the soldiers.

At this time, it is already noon, it is the most vicious time of the day, although it is almost early autumn, but the noon sunshine, is still terrifying.

At the head of the city, only a few soldiers of the Mandate of Heaven were left to monitor the Mongols at the battlements, most of the soldiers went to the city for lunch, and some soldiers folded the huge shield that had just been installed on the daughter wall and hid under the shield to escape the heat.

Lin Dan Khan's big tent in the distance, under the scorching sun, almost bubbled out of oil.

Most of the Mongolian soldiers hid in the big tent to rest, only a few soldiers lazily leaned in the shade of the tree, I don't know whether it was a summer or a sentry, they all stayed near the rolling curtain at the door of the big tent, it would be more accurate to say that they were watchdogs, but their sense of smell obviously failed to reach the head of the city, Li Zicheng led his troops to the head of the west city, they did not know.

Li Zicheng's gaze fell on the Mongolian's milk-white tent, and his heart didn't move.

The big tent of the Mongolians is soaked in mutton butter and butter, which is not only rainproof and dew, but also can protect from the sun, but everything has advantages and disadvantages, can be waterproof, the most taboo to suffer from fire, the glass mirror in Li Zicheng's hand, just can give birth to "heavenly fire", but I don't know whether this distance can produce a high enough temperature.

Li Zicheng sent the soldiers defending the city away and began to arrange them on the head of the city, and he chose a large tent on the southwest side of the upwind outlet, and asked the soldiers to use mirrors to reflect all the points of light to one point.

The eyes of the soldiers were also focused on this, and if they could have made a fire, this tent would have caught fire a long time ago.

Li Zicheng is also staring at this bright spot, if the Mongols' camp tents can be burned, even if they can't lose many soldiers, at least they can burn some property and hit the morale of the Mongols.

However, when half a bag of cigarettes is used, white smoke seems to come out of the bright spots, faint and faint, but under the contrast of strong light, some traces can still be found.

There's a play!

Li Zicheng was overjoyed, and he told the soldiers that once the tent caught fire, the fire would definitely spread downwind by the wind, and then two tents would be separated and continue to ignite.

The white smoke became thicker and thicker, and then turned to gray and black, and in the eager anticipation of everyone, finally a trace of fire was blown by the wind and spread rapidly......

When the Mongol soldiers in the camp found it on fire, the fire had already risen and in an instant, it engulfed the entire camp.

"On fire......"