I am engaged in construction in Datang

"Brother Li, this is Feng Sanxi. He was the adopted son of my daughter's deceased grandfather. Now he is the manager of the manor." After Li Yin introduced Feng Sanxi, Feng Sanxi bowed to Li Shimin.

After introducing them one by one, when it came to Zhao Erniu, Li Yin paused and raised the corners of her mouth slightly.

"Brother Li, this is the leader of the tenants in the village, Zhao Erniu." Li Yin suppressed the arc of her lips and continued to praise: "Uncle Erniu has a pure and honest character, is bold and careful, and my daughter trusts Uncle Erniu to do many things."

Zhao Erniu laughed and clasped his fists towards Li Shimin: "Brother Li."

Li Shimin: "..."

Wang De's face turned green. How could this young lady be so bold as to dare to tease His Majesty?

"Brother Zhao." Li Shimin said with a smile: "You and I have a great affinity. Your name is Zhao Erniu, and mine is Li Erniu."

"Ah! We are so destined to be together!" Zhao Erniu was even happier, holding up his wine glass and grinning, "Come on, little brother Li, let's have a drink."

Li Yin seemed to be hesitant to speak.

I silently raised my glass and clinked it with everyone else, hoping that Uncle Erniu wouldn't be so scared that he wet his pants in the future.

The meal was a great pleasure for both hosts and guests, and everyone enjoyed the meal to their heart's content.

Lunch break is a must for women in the village. It usually does not last more than half an hour, and then someone will ring the gong.

Even when Li Er came, he couldn't stop the people from getting into trouble.

There are many newly built uninhabited courtyards in the women's village, which are reserved for distinguished guests.

When Li Shimin just arrived, Li Yin sent someone to open the biogas valve and prepared new mattresses. Now it is warm inside.

The glass has not been made yet, and there are many layers of paper on the windows, so it is still a little dark inside.

After Li Yin taught Li Shimin how to use the biogas lamp, she got up and left.

Wang De came from the side room and looked at Li Shimin in surprise.

"I...my Taiji Palace, Daming Palace...none of them is as warm as this one." There was a hint of grievance in his words.

Wang De: "..."

Li Shimin spoke again: "I just asked, the whole village is so warm! They use something called biogas, which doesn't consume much. Wang De, do you know what it is?"

"I, I don't know either." Wang De looked confused.

"Ah..." Li Shimin sighed: "Let's take a nap first. Miss Li Yin, let me wake up and ask you later."

Wang De: "..."

The mattress had been dried in the sun and smelled of aromatherapy. Li Shimin sank into the bed, thinking that he would not be able to sleep, but he fell into a daze after a while.

‘Qiang Qiang Qiang…’

The sound of a gangster gong resounded throughout Zhuangzi, and Li Shimin suddenly woke up and sat up.

Wang De over there also stood up hurriedly.

Oh no! This is not a good way for Nvzhuang to wake people up! It's so scary!

Soon the two of them packed up and went out.

Outside the door, Li Yin took out a one-foot-long plaque, and when she saw Li Shimin coming out, she smiled and said, "Brother Li, this courtyard and women's manor will be reserved for you from now on, and no outsiders will come to live here."

After saying that, Wang Dahai took the plaque and nailed it next to the gate.

Li Shimin took a closer look - it was Li Erniu's house.

“……”For the first time, he regretted choosing such a name.

Over there, Wang De had already started pinching his own philtrum.

Not wanting to look at the plaque again, Li Shimin followed Li Yin and strolled around the farm.

"Miss Li, I am a few years older than you. May I be so proud as to call you my sworn sister?"

Li Yin naturally wanted it very much, as she had been worried that her background was not strong enough.

"Then I will call Brother Li my brother."

Li Shimin felt relieved to see that the young lady was so straightforward.

"Sister, what is biogas?" Li Shimin was concerned about the cost of this method and whether it could be promoted vigorously.

"Brother, follow me."

Li Yin simply took Li Shimin to visit the biogas tank.

What catches your eye is something resembling a small yurt, built with blue bricks and a mixture of lime, clay, gravel, etc.

"Methane is actually a combustible gas produced by organic matter in an anaerobic environment through microbial fermentation under certain temperature, humidity, and pH conditions. I'll give you a simple example so you can understand."

"Brother, have you ever seen a big swamp?" (hereinafter referred to as a swamp)

Li Shimin nodded. What had he not seen when he was fighting in the war?

"Brother, have you ever smelled the smell of rotten eggs in the swamp?" Li Yin continued, "If you light a fire in a place with the smell of rotten eggs, the fire can spread to the entire area in an instant. In fact, it is because a kind of combustion-supporting gas is produced in that area, just like oil, but that gas is colorless and odorless. The rotten egg smell is just a by-product of the gas production process. I call that combustion-supporting gas biogas, and its official name is methane."

Li Yin pointed at the yurt-like object and said, "That's only a small part exposed above the ground. The area underground is much larger."

"That's the feed inlet. Human and animal excrement, crop straw, weeds and vegetable leaves, etc. produced every day on the farm are poured into this inlet. These things ferment in the underground pool, simulating a swamp-like environment, and then produce biogas."

Li Yin pointed to a pipe nearby and said, "The biogas produced will go out of that pipe and be used by the village."

"Look over here. This is the discharge port. The fermented waste needs to be taken out manually and then used for planting crops, fertilizing crops, or feeding poultry."

Wang De understood and was also confused. The feces and urine of humans and animals enter the body and produce biogas, which can then be used to fertilize the land and feed poultry. It is a completely closed loop!

Li Shimin took a deep breath and said, "Sister, can this method be popularized?"

"Of course." Li Yin took out a blueprint from her collar and said, "Brother, this is the method for making a biogas digester. It can be used in the village and the farm."

"But you must pay attention to the specifications when making it, otherwise accidents are likely to occur."

Li Shimin took the drawing with trembling hands, and then... he couldn't understand it.

"Sister, is there any way to reduce construction accidents?"

"nature."

The weather was still cold in March, and Li Yin didn't want the emperor to get frozen, so she took the two of them to the study.

Uncle Sanxi prepared tea there, and now there is fried tea on the farm.

"If you want people to believe in the wonderful uses of biogas, there must be a demonstration precedent." Li Yin poured tea for the two of them.

"For example, Nuzhuang can invite officials from all over the country to visit. Those who want to make achievements will definitely ask the villages under their jurisdiction to send people to learn. If there are officials who are indifferent..."

"He should be killed!" Li Shimin's eyes were filled with murderous intent. You turned a blind eye to such a good thing, how can you be a good official?

Li Yin nodded. The food has been fed into his mouth, but he still doesn't know how to open his mouth. There is no need for such a person to be an official.

"But some places are suitable for construction, and some places are not. I will write them down in the manual for the construction of biogas digesters when the time comes."

Li Shimin nodded and said, "Wow, this tea is really delicious."

"If anyone can learn, then construction knowledge will not be taken seriously. So I think..."