When Dad reported some ideas to Li Er for consideration, Yang Heng had already divided them into three parts and started working.

Part of it is a group of construction teams led by uncles, naturally this group of construction teams recruited some farmers by Fengbo, they each came out of a labor, first began to dig the foundation, and even went to the mountains to find some suitable stones, used to lay the foundation, this matter is now more difficult, in the absence of explosives, they need to work completely by hand, fortunately, Yang Heng built some chisels and wedges a long time ago, so relatively speaking, it is relatively simple, However, when encountering large stones, it is still necessary to set up a fire and splash it with cold water, so that it can disintegrate a stone as quickly as possible, but the most difficult correction still requires the use of chisels and wedges.

The other part is that Feng Bo led a few people to start digging the mud pond, which needs Yang Heng to demonstrate, otherwise these farmers really don't dare to dig the mud in the mud pond.

"Everybody's optimistic, let's stay away from this place first, and then throw a few torches, you see, isn't it on fire, we can call it biogas, that is, the gas in the swamp, they can be used to burn, and after a while, I will make my own biogas out of it, so that you can use biogas to light the lamp at home and cook rice."

While waiting for the flame in front of him to be extinguished, Yang Heng explained by the way, he didn't explain some advanced knowledge, just told everyone what it was.

"Okay, now that the methane has been burned out, it will take a while to produce it again, so we have to go and take out some of the mud inside as quickly as possible, but don't dry it for a long time, once we find that there are more bubbles in the middle, we have to leave, and, Fengbo, you can take someone to block the surrounding leaves, don't let the leaves fall into this mud pond."

As he spoke, Yang Heng personally took a shovel to the edge of the mud pond and shoveled a few shovels of mud outside. "You see, I'm fine," "yes, we don't have anything to do." Not only did Yang Heng pass, but Dandan, who also walked over with a few older children, shoveled a few shovels of mud and came out.

"Okay, everyone, you see that Xiao Langjun has nothing to do, and we are naturally even more troublesome, you must know that Xiao Langjun is a nobleman, what are we sluts." Someone shouted, and after the demonstration of Brother Yang Heng, they believed it.

"Okay, let's do it too." There are not many people, only a few people, and there are a few women among them, all of which are grateful to the Lord's family for allowing them to plant and eat, so they will naturally work very hard.

"Alright, Fonta, but you have to watch the time, and if there are too many bubbles, you have to leave and burn the bubbles before drying." "Understand Xiao Langjun, you can rest assured to do your thing."

The next thing is what Yang Heng has to do, that is, the problem of making biogas, to make biogas, you need to have a biogas digester, but at this time, Yang Heng has no cement, and it is too late to burn, and there is no coal mine, mainly open-pit coal mine, what to do if there is no cement, then there is only another way.

What is the way, is to use glutinous rice soup, with loess and mud, when this building is dry, it is even stronger than the cement building, it is a bit of a waste of food, but fortunately, one year, Yang Heng's family, and the uncles' family planted a batch of glutinous rice, and now it is just used, and the meal list during this time will also come out, what glutinous rice dry rice, what glutinous rice cake or something, in fact, the purpose is to not let people pick out opinions, the family eats every day, you don't care how much I eat, Don't make glutinous rice every day, but I haven't heard of eating glutinous rice, that's not good, let people see that there is a story, at this time the food in the country is not very sufficient, especially after a large-scale slight locust plague, although it is said that there is no extinction, it is not a normal year.

Yang Heng made the biogas digester, and did not find any helpers, but led a group of younger brothers and sisters to do it themselves, but temporarily invited the uncle to be a consultant, and some things such as building walls for the uncle to do, don't look at the uncle is a carpenter, but in the past few years, his mason is also a small success, and the carpentry of other uncles is also a small success.

This biogas matter is not too anxious, mainly at this time Yang Heng is still looking for a coppersmith, a coppersmith who can make copper pipes, although Yang Heng can be a blacksmith, but if he wants to make some finer copper pipes, it is still a little impossible.

Coppersmith, where to find, naturally still have to go to the human market, maybe there will be some skilled slaves in the human market, Yang Heng arranged for one of his uncles to follow the housekeeper to the city, and Yang Heng is not limited to only selecting coppersmiths, that is, some other types of work, as long as there is something in the human market, or where can it be hired, it must also be hired, now Yang Heng's scene has begun to slowly pave up, and his second goal has been achieved.

His first goal is to survive, it has been achieved a long time ago, since there is a hundred acres of barren land in the mountains, this is to survive, the second step, is to let the father have a chance, now the father has become an official of the fourth grade, he naturally thinks that the second step has also been completed, and the next step is the third step, which is to develop well in Datang, and try to use some of the skills of later generations to seek benefits. And that's it, and it's a long-term goal.

There was no coppersmith, so Yang Heng led his younger brothers and sisters to slowly make the pool of the biogas digester by themselves, "Brother Heng, are you telling the truth, can such a pool really make it produce the kind of gas that burns as soon as it burns, and it can also emit blue light, even at night it is brighter than the sun." Xiao Niang was very curious and asked without words, in fact, it was not that she didn't believe Yang Heng, but she had never understood what Yang Heng said about the chemical principle, which was a very shameful thing for Xiao Niang.

"Don't ask, when did Brother Heng lie to us, you won't not understand, aha, our little genius is finally stumped again, I want to write it down, I will remember, in the second year of Tang Zhenguan, in July, Xiaoniang, that is, Sister Yang Shu, has something to do, showing quite unconfidence." "Rotten ass, stupid, you are bad, you are so bad, I want to tell my father and mother to go and say that you bully your lovely sister me and let them beat you."