"How do you know? Did you eavesdrop?" Second Yan asked nervously.

  Yan Yu is so speechless, is she that kind of person with no taste?

  Can there be more basic trust between father and daughter?

  She pointed to her little head.

   "It's all here. Just now I saw Uncle Hu helping to mix a white powder, and I remembered it immediately."

  Earth cement, a formula with only a few raw materials, is really easy to remember.

   Of course, remember that the raw materials are not enough, the most important thing is the ratio.

  Yan Yu doesn't know how good Master Lu's recipe is, but what she knows is the result of countless people's improvement and summary.

   It is also the common choice of many web writers.

   "Master Lu should use clay, quicklime and gypsum."

  She secretly motioned to her father to watch.

  Yan Er Er pretended to glance over casually.

   Clay, there should be no doubt about it, it was brought back with the help of the boys in their village.

  Lime can also be seen, only gypsum, he can't tell.

   "How do you know it's plaster?" Yan Er Er asked curiously.

  Yan Yu smiled like a little fox, "I don't know him, but Cui Langzhong does. Gypsum is also a kind of medicinal material. I went over and asked him to identify it for me."

  Yan Er was convinced.

   "It's that simple? Then why is Master Lu still covering it up so tightly? Wouldn't someone with a heart pay more attention to it?"

  Yan Yu said: "My father, of course it's not that simple, the ratio is very important, and I doubt that Master Lu will add something."

   "Add what?"

Yan Yu thought for a while and said: "I've seen people say that this kind of soil cement is still strong enough, but the frost resistance is poor, and the solidification is slow. If you want to solidify quickly, just add some Glauber's salt. Add some more adhesive and it should improve a lot."

A flash of inspiration flashed in her mind, and she said: "Father, this is Guanzhou, a border town. The plaster recipe for building the city wall is the best. I remember that in ancient times, glutinous rice was used to boil the slurry and stir the sand. It was very strong. Wait, let me Think about it, brown sugar, elm bark, camphor... camphor tree sap, hahaha, yes, that’s it!”

  Yan Yu is too proud of herself, look at our memory, and ask, who else is there!

  If it wasn't for the wrong occasion, Yan's second son would want to hold his daughter high.

  Too awesome!

   Better than Sambo!

  He thought of the geothermal project that was tragically destroyed in Waterloo.

  asked his daughter: "Dabao, tell me, is the geothermal heat in our house in order?"

  Yan Yu looked at her father without words.

   "Father! Let's be realistic, geothermal heat... It shouldn't appear in the homes of ordinary people like us. If you ask around, the prince in the fiefdom of Guanzhou, the British royal family may not be able to enjoy this blessing."

  She wrinkled her small face, and said earnestly: "What can we do, Dad!"

  Yan’s second child: …

   "The fire wall is very good, and it's also good to be on the fire kang." Yan Yu thought that he was about to roll on the fire kang, fried on both sides... he couldn't look forward to it.

   "Is your prescription better or Master Lu's?" Yan Er Er asked.

   "Of course it's me." Yan Yu replied.

   "Then what should we do, replace his plaster?" There are good ones, of course I want to use them in my own house.

  Yan Yu dismissed Yan's second child with just one sentence.

   "Glutinous rice boiled, brown sugar...Dad, that's not glue, it's all money!"

  Yan's second child deeply agrees, and the two happy father and daughter decided to keep it as it is.

   "But get rid of these two things, we can try the others." Yan Yu is gearing up for a big fight.

   "Earth cement is too useful. If it can be restored, no, it is enough for us. After the house is built, we still have courtyard walls. There is a stone flake floor in the house, and the courtyard can be leveled with cement.

   By the way, there are toilets! Dad, let's not worry about the heat, the toilet is the key point! "

  The importance of squatting in the pit was realized as soon as they walked through it.

As soon as the toilet was mentioned, Yan Yu said again: "There is also our self-produced 'fertilizer' to build a cement pond for them, Dad, the soil pit you dug is too shallow, let's learn from experience and dig it deeper next time. "

  Yan’s second child: …

   He also said that he was entangled, at least the things he was entangled with were not stinky, but his daughter actually thought about these stinky things.

  Yan Yu knocked on her head in frustration.

  It's a pity that my brain is not fully functional, and I can't remember many things clearly.

  It’s like glass, wine making... These are all magic skills of time travel!

  …

  Yan Lao Er didn't have time to talk to his daughter anymore, so he rushed to the field by the river.

  When I reached the ground, I couldn't help sighing: Mother Rong—really—one is worth two!

  The weeds are piled up so neatly.

   All he has to do is light the fire.

   Burning grass must be treated with caution, especially in lush vegetation, if it fails, it will be a big problem.

  Yan's second son asked a few sons-in-law of the Song family to help.

  The Ding of the old Song family is also prosperous, but it is the opposite of the Luo village chief's family, Wang's daughter.

  The old man Song and the old lady Song are capable, the girls are good-looking and capable, and they are unique in finding a son-in-law.

   Just the fact that no betrothal gifts are required, makes people from ten miles and eight villages flock to it.

   Not marrying into the family, not changing the surname, and eating rice from the old Song family, there are too many people who are willing.

  No, the three daughters earned back three sons-in-law.

  The four sons of the Song family were originally a single Miao Miao with a weak body. Since welcoming the three brothers-in-law, their bodies have become stronger, and they even brought a youngest to the Song family.

  Song's Xiao Wu is one year younger than his daughter.

  What is this called? Call wisdom!

   Gathered three sons-in-law, what's the difference with Bai Caisan's son!

  Yan's second child feels that he has to learn from others.

  Enrich your own experience.

  First light a small fire, and then raise the grass up with a rake. Don't be impatient.

  The fire started quickly, and the flames ran high.

  There is no wind today, it is really a good weather for burning grass.

  The four people kept controlling the fire to prevent it from burning out.

  The grass is not yet dry, and the smoke is billowing.

  Yan Er Er ran a little farther to take a breath, and ran back quickly.

   Mask masks!

  Gosh, he misses masks so much right now!

  He didn't know how to cherish it when he wore it every day, and he regretted it until he didn't have to wear it.

  The pain of being choked, whoever chokes knows.

  If he was given another chance to burn the grass again.

  He will definitely—make a mask first!

  The three uncles of the Song family went home for lunch after being burned.

  Yan Lao Er thanked him for a meal.

  The third uncle of the Song family is quite happy.

   "Second brother Yan, you burn grass to greet me again."

  Yan’s second child: …

   It's also fun.

  Back to his homestead, Master Lu was leading people to sift clay.

  Sieve the soil several times into fine flour, and mix it with quicklime and gypsum according to a certain proportion.

   Pour water and mud.

Then…

  Master Lu really did as his daughter said, pouring water from two bamboo tubes into it.

  Yan Er Er approached curiously, wiggling his nose.

  Sweet taste.

   is brown sugar.

  At this moment, Yan Er Er felt relieved.

  Master Lu's craftsmanship, his construction team, and the cost of blessing brown sugar.

   There is actually a feeling of value for money.