Autumn is coming, and it's normal to have a lot of rain. Especially on the Cochin side, the air is always humid.

It's just that today is the first rain after Downing came here, and it's quite commemorative.

Shenqian sent a message to say that the defenders of Guangyuan City had shot their own people. Tang Ning was a little happy, the second step of his plan seemed to have been completed.

It is not known whether the first step has been completed. It was extremely difficult for the Wude officials to infiltrate Guangyuan City, especially after the Song and Yue armies started the war, Guangyuan City even drove away the local Song people or imprisoned them.

Therefore, in the absence of spies in Guangyuan City, it is very difficult to understand what role my article played.

After another dull thunder, a light rain began to fall.

A few days ago, when Chu Lao and several merchants of the Wen family ran to look for water, they suddenly found that the wells near Guangyuan City were either blocked or cut off.

At this time, this rain was very important to the Song army. Before the rain began to fall, some soldiers quickly put all the pots and pans outside to collect the rainwater.

The method of collecting rainwater and then filtering it is a compulsory course for soldiers in the Zhenjiang Army, as is the knowledge of first aid. Both of these will play an important role that should not be underestimated when marching and fighting.

The rain became heavier and heavier, and in a short time, the drizzle turned into a downpour.

At this moment, Li Changjie suddenly sent troops and personally led 20,000 of his subordinates to kill them from the south gate.

When Li Changjie found that the sky was gradually becoming overcast, he knew that his opportunity had come.

Since it's called gunpowder, it must have something to do with fire. It was raining heavily, and Li Changjie didn't believe that their fire could continue to burn under such circumstances.

But Li Changjie still kept an eye on it, after all, it had not been a few days since the Fuliangjiang River caught fire, and it had happened not long ago, and Li Changjie even felt that the black smoke was still billowing up over the Fuliangjiang River.

So he did not attack with his whole army, but left 30,000 men in the city. If the war is unfavorable, then these 30,000 people can still go out of the city to meet them, or continue to defend the city.

And when marching, Li Changjie also paid great attention to letting the soldiers disperse.

The army of 20,000 people stood in five rows, and there was still a long distance between each platoon, and Li Changjie felt that this formation should not be hurt by the gunpowder of the Song army.

……………………

The pouring rain was falling down, and the situation was extremely unfavorable for Song Jun.

Originally, the humid climate of Cochin had some restrictions on gunpowder, and during the two days of fighting, a lot of damp and dumb gunpowder was found.

And this heavy rain directly eliminated the effect of gunpowder.

When Xiaoshi first selected the site, it was proposed to plant and build. Instead of directly guarding the nearest forest in the south of Guangyuan City, he chose a valley that was a little back.

Although this is not conducive to the observation of Guangyuan City, it is fortunately safe, and once it falls into an unfavorable situation, it is also very convenient to retreat.

Another thing is that the people of Jiaozhi will definitely not think that Song Jun can easily give up the forest in front of them, this is a good place to set up an ambush.

Therefore, the Cochin people will definitely search this place carefully before attacking, and they can also buy enough time to prepare for the small stone department that gets the scout's message.

Sure enough, when Li Changjie approached the woods, he began to order the whole army to be on alert, slow down, move forward slowly, and never fall into the ambush of the Song army.

Stretching too far in formation may weaken the gunpowder's function, but it is especially dangerous in this situation. In the unlikely event that a soldier in one place was attacked, the people from other places would not be able to rush to support him in the first place.

But Li Changjie had his own considerations, and in the case of being as loose as possible, Li Changjie withdrew the soldiers on both flanks, concentrated them near the main formation, and turned the formation into a 'Gui' shape.

After careful investigation, it took a full hour for Li Changjie to determine that there was no Song Army in this forest at all.

He was annoyed and felt that he had been deceived. So he gathered his forces and struck the valley ahead.

After an hour, the rain did not stop, but became heavier and heavier.

The land under his feet has become a quagmire, but fortunately, the place selected in the planting and construction is not a depression, and the terrain is high, otherwise Li Changjie would not have to do it, and Song Jun himself would have been disgusted to death by the mud.

When Li Changjie's scout vanguard rushed out of the woods, they found that there was a camp of the Song army at the entrance to the valley ahead. He immediately turned his horse's head and went back to report to Li Changjie, Li Changjie held back a fire in his heart, didn't say anything, drew his sword and pointed forward, and the Jiaozhi soldiers rushed forward with a scream.

The Song army, which had already been prepared, immediately began to shoot.

Li Changjie was shocked, and said in his heart that in this rainy weather, are the bowstrings and crossbowstrings of the Song army not subject to moisture? Why did they show their heads on their side, and their arrows came over, so far?

What Li Changjie didn't know was that the Song army that came to attack Jiaozhi was not an iron rooster. Anything that can maintain combat effectiveness, they will do it.

For example, the high temperature ~ humid heat in the south, the hoplites are not suitable for long-term combat here. Tang Ning ordered the limbs of the infantry armor to be removed, so that the hoplites who originally wore the infantry armor were equipped with some light armor on their limbs to maintain their combat effectiveness.

The same was true for crossbowmen, who Downing ordered the entire army to wax the bowstrings and crossbowstrings every other day, scraping them off and rewaxing them the next day.

After one use, rewax as well. In this way, the loss of bowstrings and crossbowstrings can be reduced

consumption, but also to a certain extent to organize the bowstring and crossbow string to be damp.

It's not that Li Changjie doesn't know this kind of little knowledge, it's just that he thinks that Song Jun has no reason to be willing to spend such a big amount of money.

String wax is not the same as ordinary wax, and most of the string waxes used by hunters and armies are beeswax, which is not easy to use, so the price is not cheap.

But Downing found another way to reduce costs, and that was to mix beeswax with petroleum jelly to produce better results than pure beeswax.

As for something as strange as Vaseline, the maker was not Tang Ning, but Shen Kuo.

Ever since Tang Ning told him about the role of oil, Shen Kuo had been very interested in this thing.

A few years ago, when Tang Ning was fighting in the northwest, he personally went to Yanyan Road to take a look.

Originally, the Song people didn't attach so much importance to oil, but Tang Ning naturally knew how powerful oil was. So he told Zhao Xu and designed a simple water pump to pump oil.

Of course, the design he designed is not so easy to use, and this pump has been transformed by Su Song.

Incidentally, he found that if the artisans who were engaged in oil extraction suffered burns and cuts, they would scrape off a layer of wax and apply it to the wound on the pump that drew oil, and he tried it himself, and was surprised that it worked well, and that it could relieve the pain, and the wound healed much faster than usual.

So he observed there for half a year, and after figuring out how this thing came about, he went back and started developing it himself.

However, his research made no progress, and he finally used the recovered oil as fuel to light the lampstand for a night, only to find something white on it.

When he scraped it off, he couldn't figure out what it was. So he remembered Tang Ning, sent someone to bring a letter, and sent it to Jingyuan Road with this thing.

At that time, Tang Ning had not yet gone to Tiandu, and after receiving this letter, he opened it and felt that this game should be very similar to lubricating oil.

Then he tried to recall, wasn't this Vaseline?

He vaguely remembered that Vaseline had a process of refining and purification, so he replied to Shen Kuo. He didn't know the specific method, but Shen Kuo, the old man, deserved to be a science madman, and he really got Vaseline out.

Tang Ning admired the five-body throw, and gave Shen Kuo ten years of hard work to study the steam engine, it is estimated that the Southern Song Dynasty will enter the era of cyberpunk......

All in all, the Natal Petrolatum, now named by Shen Kuo as mineral wax, has become a by-product of petroleum.

After being mixed one-to-one with beeswax, it is best used as string wax for the maintenance of bowstrings and crossbow strings.

This is also the main reason why the Song army can still ensure the performance of the bow and crossbow even in rainy weather and humid environments, which is also one of the top ten unsolved mysteries of the Song army in Li Changjie's mind......

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