As the territory around the Lingjiang Fortress was gradually consolidated by the Japanese army.

The tentacles of the Japanese army finally decided to start spreading to the surrounding area based on the Lingjiang fortress......

At the same time, Zhang Ran and his Jindong detachment finally took the first step to expand outward!

The first and second workshops in the detachment are in full swing producing the only materials that can be officially produced at present, grenades, mines......

The fighters of the four platoons are stepping up their training in preparation for the upcoming battle against Cangshui.

Zhang Ran, who had not been trained for a while, finally began to train with the troops.

In other aspects, the requirements can be lowered, but in terms of physical fitness, Zhang Ran needs to be able to absolutely keep up with the rhythm of the detachment.

At the same time, physical training began to be carried out by a health team and a team of 40 people.

These people will be able to bear the wounded of this expeditionary mission against Cangshui, as well as logistical support.

Perhaps because of the distribution of a large amount of fertilizer, both the common people and these people who have participated in the training obviously have more feelings for the detachment, which can be seen from their eyes.

That kind of concern, like looking at a loved one who is about to leave, has a faint attachment spreading through it.

Kolangzi Ren Haifang is back.

Not only did they bring back a large amount of salt, but they also brought back the Miao medicine, Panax notoginseng and other medicines that Zhang Ran asked them to buy.

Miao medicine, in fact, is the future Yunnan Baiyao.

It's just that at this time, there is no brand awareness, and it has not been controlled by the capitalists for large-scale production, but its medicinal effect can still stand the test.

Compared with Western medicine, the most intuitive thing about traditional Chinese medicine is their efficacy.

In any case, I have to admit that the effect of Western medicine is definitely faster, more direct, and visible to the naked eye than that of traditional Chinese medicine.

Miao medicine also belongs to traditional Chinese medicine, but it is a bit strange in traditional Chinese medicine, that is, the efficacy of Yunnan Baiyao in promoting the healing of trauma and so on, is not worse than many Western medicines.

This is also the reason why many years later, Miao Yao has become a huge and popular brand of Yunnan Baiyao.

When Ke Langzi and Ren Haifang counted the money, they couldn't see the smiling eyes.

Obviously, when they came back this time, whether it was the salt or Miao medicine they brought back, or the medicines that Zhang Ran of Sanqi confessed, they made a lot of money.

Of course, they earn more, and Zhang Ran is also happy.

Because they not only brought back the things that the detachment urgently needed such as salt and medicine, but also brought back a huge amount of information about Cangshui, and even clumsily drew a map, marking a lot of detailed information at many key nodes - such as how much time it takes to climb from the foot of the mountain to the top of the mountain at the fastest speed, such as how much time it takes to rush from a certain place to a certain place, and so on.

These things are all measured step by step with their feet by relying on their identity as merchants.

Don't look at them smiling happily now, in this process, they have indeed paid countless hardships, and it should be earned more......

As long as it is not like Xu Jiunian, who is constantly making inches and working hard with money, Zhang Ran has no opinion.

On the simple map drawn by the two of them, Zhang Ran, Kang Ting, Wang Laogui and the four platoon commanders, Shi Yuan, Wang Kai, and Zhang Baoxing, the thin monkey, began to make pre-war deployments and various deductions......

Although this map looks extremely rough and far less reliable than a regular military map, it is extremely useful when combined with the data measured by the two of them with their feet.

For two days, several people were battling against this map, and after taking into account all the most dangerous situations, Jiren finally decided on a battle plan against the Kurasui Self-Defense Force.

It's still the old routine, and it's around the point to help.

With Duanjiazhuang, which is located outside Cangshui County and three kilometers away from the county seat, as a breakthrough point, the Cangshui Self-Defense Force was transferred out of Cangshui County, and then concentrated superior forces and made a half-way assault.

However, the difficulty lies in the fact that from Cangshui County to Duanjiazhuang, not only is the distance close, but there is also a flat river around, and there is no suitable location for a sneak attack!

"So the time must be chosen at night, and strive to break the courage of the Cangshui Self-Defense Force in one battle before they arrive at Duanjiazhuang!"

Zhang Ran said: "Just in case, we have to add another insurance ......"

After listening to Zhang Ran's proposal, everyone thought it was true and went to prepare.

Zhang Ran immediately went to the back mountain again, beckoned Mao Zuan's side, in addition to the conventional grenade mines, a special batch of mines and grenades all loaded with good medicine!

These powerful grenades will be handed over to the god pitchers who have trained precision bomb throwing to the point of being superb, as for this batch of special mines, they will naturally be buried in the middle of the road and wait for the Cangshui Self-Defense Force to come over, and strive to blow up these guys in a wave, and kill as many as they can!

"It's not a small road, it's a traffic artery!"

Zhang Ran said to Mao Drill: "So these mines can't be detonated by pressure hair, otherwise if the people step on them, it will be troublesome to cause accidental injuries - all of them are designed to pull hair!" ”

After explaining this, Zhang Ran went to the second workshop.

While carrying out the production of grenades, the second workshop did not forget the research and development of bearings.

The steel ring melted and poured by good steel seems to have become a lot brittle because of the process, and Niu Da has to add a forging process after pouring to enhance the strength of the steel ring, and the subsequent situation is that the workload of the fitter's side has increased greatly......

In any case, Zhang Ran's plan to bring a batch of chicken buses loaded with bearings to transport supplies and the wounded was completely ruined......

Therefore, when Cheng Dongguo and Cui Sanyuan Niu faced Zhang Ran, they were obviously a little guilty, feeling that it was because the work of himself and others was not in place, which affected the combat mission of the detachment.

"Nothing comes in one fell swoop - I know you did your best!"

Zhang Ran patted a few people on the shoulder and comforted them, then went out and went to the copper smelter and coking plant to check it out.

Deng Fang has now changed the reducing agent from coke several times, because the cylinder body has not been cleaned, and the original sulfuric acid containing too many impurities is used to make the mother acid, and the reducing agent can only be judged by the slight change in the color of the sulfuric acid.

The color of sulfuric acid does have a tendency to become lighter, if the tower cylinder is cleaned up and the mother acid is added again to prepare sulfuric acid, Deng Fang does not dare to say that pure sulfuric acid can be directly prepared, but at least it is much purer than the current batch of sulfuric acid.

At the same time, Deng Fang also put forward another suggestion, that is, to add a sulfur box on top of the tower cylinder!

Although the sulfur content of the copper ore in Jianzishan is not low, but the efficiency of preparing sulfuric acid simply through the exhaust gas is still too low, and his opinion is to add the sulfur box on the basis of the existing tower cylinder, and purposefully increase the sulfur content in the exhaust gas, which will greatly improve the preparation efficiency of sulfuric acid.

Of course, this is only his idea at present, and he put it forward to discuss with Zhang Ran, and it can only be carried out after the transformation of the tower cylinder after the furnace is extinguished.

Although Zhang Ran was a second knife, he still knew that Deng Fang's direction was right when he heard this proposal-because from his vague memory, it was true that when the Eighth Route Army used the tower cylinder method to prepare sulfuric acid, it seemed that there was indeed a sulfur box.

But this also poses a problem - the need to buy additional sulfur......

Zhang Ran can only be glad that there are many sulfur things now, and it shouldn't be too difficult to buy.

"These things, Deng Gong, you can look at them - but the transformation of the tower cylinder will be carried out after the fertilizer production is over!"

Zhang Ran explained that compared with the urgent need for sulfuric acid, he paid more attention to food security......

Only with enough food can more people survive, and more people can support the detachment and support the Eighth Route Army in this unremittingly struggle against the little devils behind enemy lines!

After doing this, Zhang Ran went to the farm again and saw a lot of chickens that had grown up.

The first batch of chickens into the pen is already very large, but the number is a lot less - this month, the detachment is eating chickens every three or five times, those roosters who vacate the pen have eaten a lot, and the rest are mostly hens, it is estimated that in another month, it will be able to enter the laying period.

The second batch of chickens has grown a lot, and the small ones are at least more than a pound......

There are a lot of chicks on the fence, chirping like pompoms.

The rabbit hutch dedicated to raising rabbits has long been built, and those rabbit species have been divided.

In the rabbit farm, Zhang Ran saw Wang Wenhua.

"These female rabbits are already pregnant!"

Wang Wenhua pointed to the female rabbits with bulging bellies and said excitedly, and deliberately pointed to two of them.

The two female rabbits, at first glance, were domesticated by hares.

"I have caught more than 30 rabbits for a while, and these two females and one male have ......lived, and the others are all dead," Wang Wenhua said, feeling that the hare's temperament was too strong.

After some encouragement, Zhang Ran came to the outside of the village, looked at the large crops that were obviously much stronger than before due to the application of chemical fertilizers, and took a deep breath of the air full of the fragrance of plants......

He hoped that when he returned from Cangshui this time, he would see an unprecedented harvest in this land.

It's just that Zhang Ran isn't sure if he can come back alive, after all, this is the war years - if a traverser is shot or hit by a shot, he will still die!

But looking at the so many belongings he has left here in the past few months, he believes that even if he does not have himself, this base area will definitely become one of the most important base areas behind enemy lines, and make indelible contributions to the nation's anti-Japanese cause!

It's night.

The four platoons of the Jindong detachment, taking advantage of the night, with a total of more than 180 people from the health team and the people's team, plunged headlong into the vast dark night and headed towards Cangshui......

At the same time, Long Xin, who was covered in blood, finally reported the news of the movement of the Japanese Yoshino Brigade to Pu Yuanzhong's ears!

The independent regiment immediately set off with the whole regiment and launched a large-scale rush and transfer, trying to find a breakthrough from the encirclement of this heaven and earth net!