"My lord, this thing called cement is not simple, you think that the house made of that thing is like stone, it is extremely strong, what if it is used to build a city?" Master Feng Quan said.

"Is it that good?" The county magistrate hesitated.

In this era, scholars have a common problem, they do not pay attention to some practical things, and in the eyes of the county master, cement is just a strange and ingenious skill, and it is something made by craftsmen who belong to the third class of people.

"Can this thing make money?"

"They played a big game of chess, as long as this thing is recognized by most people, in the future, everyone will build a house or repair something at home, they will come to them to buy it, then they can make a lot of money, when they find adults to grant land, they should be involved."

"I regret not being at the beginning, it's definitely not going to work now, these guys are not easy to mess with."

The county commander's surname is Huang, called Huang Bairen, and he has been in Danling County for some years. In addition to good money, the reputation in the entire county is neither good nor bad. In general, he is a seven-rank sesame official who has not done much, but he has not done anything angry and resentful.

"Yes, fortunately, the adults have completed the tasks assigned by the above this time, and the adults above have also praised them, maybe your position should also be moved up, my lord."

"Haha, I'm happy when it comes to this, this year's donation collection has never been smoother." County Commander Huang Bairen said with a laugh.

Although the process is very tortuous, for the task of collecting donations distributed by the imperial court, it was successfully completed within a few months without any major incident, which is a very lucky thing in Huang Bairen's opinion.

The county order and the master talked about the cement observation deck and cement for a long time, and slowly turned the topic to the county order's career.

In the small courtyard prepared by Wan Yunjun for Zhao Yuan, Zhao Yuan, who had washed up, felt refreshed, and even the hot weather was not so irritating.

With the increase in the number of subordinates, Zhao Yuan is no longer like at the beginning, he has to do everything by himself, and the next thing he has to do is just wait.

"Guo Du, come on." Zhao Yuan, who had long hair draped behind his head and occasionally had a few drops of water dripping, shouted outside the house, really wanting to cut off this long hair.

"Sir." Guo Du and the others walked from the big tree outside the courtyard to the hall.

"It's too hot this day, you guys go to the pharmacy and buy some saltpeter and come back." Zhao Yuan said.

"Yes."

As for the role of saltpeter, Guo Du and several people have already understood it from Zhao Yuan's mouth, but because they are coming to the county seat, several people have never seen it. Hearing Zhao Yuan's request, the four of them discussed, Guo Du and Xu Xiang went to buy saltpeter, and Shao Meng and Zhu Mian stayed behind to help Zhao Yuan make some preparations.

"Although saltpeter can be used for medicinal purposes, we can't directly eat ice containing saltpeter, so we need to find a container with very good heat transfer ability to separate the ice to be eaten from saltpeter." Zhao Yuan thought about the method of making ice from saltpeter.

"Master, how to do it?" Shao Meng asked.

"I remember that there is a copper basin here, so I will go find it first." Zhao Yuan said with a smile.

"In the kitchen, I'll get it." Looking at Zhao Yuan and the others' fanfare, Xiao Qi took the initiative to help and said.

"Okay, go get it, I'll change an immortal method for you later." Zhao Yuan said with a smile.

"Master Zhao still knows how to be immortal?" Xiao Qi, Xiao Cui, and Xiao Juan's eyes widened.

Zhao Yuan smiled mysteriously, which made Xiao Qi and the three of them drum in their hearts, and suddenly felt that the old man Zhao in front of him was very awe-inspiring.

"I'll help you get it, our master is not a simple immortal method." Shao Meng laughed.

"Alright, let's go get it first." Zhao Yuan shook his head lightly and said.

Turning water into ice, in the eyes of Xiao Qi and others who don't know the principle, isn't it a fairy law.

The house was a little stuffy, and Zhao Yuan also came to the courtyard to sit on the recliner under the big tree, shaking the fan, listening to the endless cicadas on the tree, leisurely.

"Brother Shao, what else will Master Zhao do, isn't he really an immortal?" Xiao Qi, who came to the kitchen, asked Shao Mengdao.

"That's a lot, but the best thing about our master is that the food he makes is very delicious." Shao Meng smiled mysteriously and did not answer the question of whether Xiao Qi Zhao Yuan was an immortal.

"We all know this, last time Mrs. Zhao and the others made a lot of food that we have never seen before, are these all invented by Master Zhao?" Cui asked.

"Yes, but it's all written down by Miss." Shao Meng nodded and said, there is one thing that has not been said, Zhao Yuan made ice for eating.

Jishitang, which is facing the street, is pulling the skin, because two men suddenly broke in, saying that they wanted to buy all the saltpeter in the pharmacy. How can this work, saltpeter is usually used in small amounts, but as a famous pharmacy in Danling, although there is a certain inventory in the store, it cannot be sold out at once, what if these people buy it back and eat it badly, isn't it bad for the reputation of the pharmacy!

"Doctor, it's really useful for us to buy back, not to make medicine, and not to eat directly." Guo Du touched the back of his head and said.

"That's not good, you said you want to buy it all at once, what if other patients need it." The old doctor of Jishitang said.

"So, how much saltpeter do you have in your pharmacy, and we can only buy half of it?" Guo Du talked to the old doctor for a long time, and when he saw that he didn't say anything, he took a step back and said.

I didn't expect it to be so difficult to buy some saltpeter in the county, a few days ago in Gray Plains Town, the shopkeeper Tao helped buy such a large bag of saltpeter back, and I didn't see any effort.

"It's pretty much the same, but I have to go with you, this thing can't be eaten in such a large amount, you must know that the medicine is important to the monarch and the minister, and you must not use it indiscriminately, otherwise there will be a big problem." The old doctor continued to chatter.

"This?" Xu Xiang hesitated.

"Then we want eighty percent of saltpeter, doctor, you must know that you are not the only one who sells saltpeter in the city." Guo Du said.

"Okay, eight out of eighty, Xiao Yun, how many saltpeters do we have in the store?" The old doctor asked a little girl in the shop.

"Grandpa, there are thirty-one pounds, seven taels and six dollars." The girl named Xiao Wan said.

"Weigh twenty-five pounds." The old doctor commanded.

"I don't know if it's enough, buy it back first, and see what the master says." Guo Du muttered.

Although Jishitang is not big, it is more famous in the county, especially the old doctor in the pharmacy, named Ge Qing, not only has excellent medical skills, but also the medical ethics are admired by people who come to catch medicine and see a doctor.

"It's not me who blows, in terms of medical skills, except for Zhao Si, a divine doctor who came to the county seat some time ago, I really haven't served anyone." Doctor Ge said.

Weighing the saltpeter and putting it in a bag, Guo Du and the two took Doctor Ge towards the place where Zhao Yuan lived, maybe the old doctor was old, and they talked to the two of them all the way.

"And the people you admire." Guo Du said with a smile.

Doctor Zhao Si is still the fourth uncle of my master.