The sun is scorching and the heat is unbearable.

On the wide school field, a team of sergeants were undergoing arduous training. Each of them carried ten kilograms of objects and ran around the school field amid the loud sound of horns.

They were panting like cows, sweating like rain, and their skin was tanned by the scorching sun, but they were still persisting.

Correspondingly, Xu Yan, who was squatting under the shade of the tree, was eating peaches in his mouth. His leisurely appearance made the soldiers grit their teeth.

It was this guy who told the general that the special forces training method could improve the physical fitness and combat effectiveness of soldiers in a short period of time. The general believed it and selected two hundred soldiers from the army for experiments.

Every day before dawn, they have to get up and run and exercise, then climb net hooks, climb over obstacles, crawl forward, pull up, and practice fighting skills and hard qigong in the afternoon. They swim and hold their breath every three days, and live in the wild every five days.

Xu Yan completely copied the special forces training method of the previous life, set up many projects, and set a time limit. If he failed to complete it, he would be punished.

He spoke easily when he touched his mouth, but he cheated the soldiers. Such high-intensity training made everyone complain!

As dusk began to come, the day of training finally ended. The soldiers dragged their heavy legs and walked into the tent exhausted, took off their clothes and jumped into the wooden barrel, making up screams.

Adding herbs to the wooden barrel can relieve fatigue and strengthen the body. It was thought about by Xu Yan and Dr. Zheng.

"What a howl? A seven-foot man, can't even bear the pain?" Xu Yan lifted the tent and walked in.

"You are very light-hearted. Don't hide if you have the ability. We will train with us tomorrow to see if you can stand it!" Pang Hu said viciously.

"You think I'm stupid? I won't suffer that crime!" Xu Yan rolled his eyes.

Yin Shenglong next to him smiled bitterly: "Brother Xu, aren't we just secretly drinking a few jars of wine for you? Is it necessary to come up with this idea and let the general practice me so hard?"

When Xu Yan mentioned this, he was angry: "I think I feel sorry for wine? I told you so many times that it was not wine, but alcohol. Fortunately, the purity of my refining was not high, otherwise you would have finished playing!"

"Who are you hustling? I smelled that smell and it was obviously a good wine!" Pang Hu shouted with his neck.

Xu Yan glared at this guy angrily, Pang Hu was not showing any weakness, his tiger eyes widened, and he became more and more innocent.

"Okay, Hu Zi, Brother Xu is a disciple of a genius doctor. What he said should be true!"

Zhao Chenghuai came out to smooth things over and bowed to Xu Yan, "We are a few of us who are rash, please don't blame me!"

Xu Yan waved his hand: "I'm not that stingy, I just want you to know that the more you drink, the better you are, otherwise the more you drink, the faster you die!"

Seeing that he didn't seem to be joking, Zhao Chenghuai and Yin Shenglong both said they remembered it, and Pang Hu was so depressed that he did not refute it.

These three people have different positions in the army. Yin Shenglong is the Yueqi lieutenant, commanding all the cavalry, and Pang Hu is the infantry lieutenant, and he is brave in combat. Although Zhao Chenghuai is not in charge of the army, he is in charge of logistics, military equipment and food. It is worth mentioning that he is also the nephew of General Zhao Shouting.

As for other people who train, most of them are generals.

"I was just talking casually. Seeing that your military training method was too simple, I chatted with Dr. Zheng. Unexpectedly, he turned around and told the general. The general said he wanted to try it, and then according to my method, he increased the difficulty several times!"

Xu Yan spread his hands and said, "This is something I had never expected. Yesterday I heard from Deputy General Peng that the training is very effective, and you probably still have some things to endure!"

A wailing sound suddenly sounded in the tent, and everyone was in tears.

"I know you have worked hard, so I specially asked someone to cook herbal tea so I won't be afraid of heatstroke in the future!"

The soldier walked in with a tray, with wooden tea cups on it and thin reed poles inserted. Xu Yan took a cup, bite the straw and started drinking it.

The recipe for herbal tea is learned from medical books. It is boiled with licorice, hawthorn, mint, and honeysuckle. It tastes sweet and looks very similar to later beverages.

Pang Hu was not durable straw, so he picked up the cup and took a big mouthful, chewing it in his mouth: "Huh? Are there ice cubes?"

The others also discovered it and were very surprised. Yin Shenglong asked, "Brother Xu, where did you get the ice?"

"Just make it yourself, just find some saltpeter!"

Xu Yan moved a stool and sat down: "I was just about to ask you, how do people usually cool down when summer is so hot?"

"What can I do? Drink tea, fan, and take a bath. Only noble families will dig ice cellars in winter to store ice for use in summer. Ordinary people can only carry it!" Yin Shenglong took a sip of herbal tea, felt the coldness and sweetness, and sighed comfortably.

Xu Yan touched his chin: "So, if I transport the ice to Lincheng County, there should be many people buying it?"

"This is natural! I heard that in Chang'an, the capital, ice is more expensive than silver when it is hot. If Brother Xu really has the method to make ice, I am afraid that it will be rich soon!"

"I can't do it alone, and I need the help of my brothers in the camp. If I tell the general about this, I will share the money I earn, will he agree?"

Several people were stunned when they heard this. Zhao Chenghuai reacted first and said in surprise: "This is not a bad thing. How could the general not agree? Brother Xu didn't know that there was always a shortage of money and grain in the camp, and the salary paid by the Ministry of War was never enough. The general was always worried about this. Now that he had a way to make money, he would be happy. Let's go, I'll take you to see the general!"

He jumped out of the wooden barrel with a slam, and his naked body splashed everywhere.

Xu Yan covered his eyes: "You'd better put on your pants first!"

Zhao Chenghuai protected his crotch with both hands, looked embarrassed, and everyone laughed.

After sorting it out, the two of them came to Shuaibao and told the matter carefully. Zhao Shouting attached great importance to it and asked Xu Yan: "You really can make ice?"

"As long as there is saltpeter, you have as much as you want!" Xu Yan said affirmatively.

"I can send sergeants to help you, but I don't know how to distribute the benefits?"

"How about June 4th?"

"No, at least 55!"

Xu Yan was stunned. He wanted to say that the military camp had six and he wanted four. After all, he only had an idea. Both the raw materials and labor were required to be sent to the military camp. He thought that Zhao Shouting would lower the price, and Sanqi could accept it, but he didn't expect that he misunderstood and directly opened five or five.

Zhao Shouting thought he was unhappy and explained: "I am not a person who loves money, but the military pension has been delayed for a long time. Although the court agreed to allocate funds, it has not arrived yet. The soldiers killed the enemy for the country and died without regrets. However, the parents, wives and children at home still need to be supported. Whenever I think of this, I feel very guilty. Now that you have the method to solve the urgent problem!"

Xu Yan was shocked and dared to delay even the pension. Wouldn't the court be afraid of mutiny?

Seeing Zhao Shouting so sincere, he hurriedly said, "The general's words are really thought-provoking. The boy is not the one who regards wealth as his life. The money he received from ice making this time will be paid for, and he will give it to the soldiers!"

"No!" Zhao Shouting waved his hand and said, "This is the solution you came up with. How can I force it to take it?"

"Then, I only have 10% of it, and the remaining 90% will be returned to the military camp! I will not hide it from the general. The boy came up with this idea just to make some pocket money and make fun of it. It is useless. The remaining 90% of the generals will be taken to emergency!"

Zhao Shouting looked at him and admired: "Since you have this intention, I won't say much. I have written down this favor. Leave this matter to you two to do. As long as you need, I will directly retrieve it from the camp!"

After the matter was settled, Xu Yan immediately took Zhao Chenghuai to the back camp and demonstrated to him how to make ice!

He asked someone to find saltpeter, pour it into a large tank, and then pour water into it. The water merged into the saltpeter, and a violent reaction occurred. A large area of ​​cold air immediately emerged. Xu Yan found a copper basin, put it into the tank, poured water into the copper basin, and let it sit for a while. Then the water droplets in the copper basin condensed and gradually formed ice.

Zhao Chenghuai was stunned: "It's so simple?"

"Or what do you think?"

Xu Yan patted the water tank: "It's still too small, and the ice produced will melt soon. We need larger containers and more saltpeter. What are your suggestions?"

Zhao Chenghuai thought to himself: "Saltpe is easy to deal with. As far as I know, this thing is available in nearby mines. We can send people to dig it. As for containers, can wooden barrels be OK?"

"As long as there is no water leakage!"
Chapter completed!