There are quite a few things that the lord of Yongping is interested in.

There are all kinds of miscellaneous knowledge points in Xie Mulin's notes. Some of them were copied from the books in the study space, some of them were really found from the various new and old books she collected on a daily basis, some of them were the tips of life that she summed up based on the words of the elders, relatives and friends around her, and even some of them were "verified" by her own experiments, such as recipes or something. But all the knowledge that she thought might be useful to her, she sorted it into categories, wrote it down in her notes, stuffed it into the bookshelf of her boudoir, and took it out and flipped through it when she was free.

Brothers and sisters or friends outside came to her room to sit down, and if she wanted to borrow notes, as long as the other party was not too disgusting to Xie Mulin, she would usually borrow them. It's just that others borrow and borrow, and whether they will be interested in the content is very casual. At least Xie Yinghui and Xie Yingfen have always been only interested in various patterns or skin care product formulas, and the latter will take a look at medicinal diets, pastry formulas or something. And Xie Yingrong is very cold, at most he only borrowed two poetry books from Xie Mulin and flipped through them, and he was never interested in her notes, and after turning to the loom structure diagram at the beginning, he never touched her notes again.

The brothers will come to see the various geographical and agricultural knowledge she has collected, and learn about the customs and grain production of various places. Xie Huizhi likes more miscellaneous books, and Xie Mulin doesn't know what parts he has flipped.

The content that the county lord of Yongping is interested in is a bit like a synthesis of the interests of Xie Mulin's second brother, eldest sister, third brother and younger sister, she is very curious about the food formula, she also wants to copy the skin care product formula, and will compare the geographical description in Xie Mulin's notes with the relevant books of Yanwangfu, in addition, she surprisingly pays attention to various civil engineering-related knowledge.

For example, the cement formula is what she is very interested in.

She said with a smile: "Our cement recipe in Beiping has always been used, although we know that the number of craftsmen in the recipe is small, and not everywhere will use cement to pave roads and build walls, but it will still be used." But there are actually several kinds of cement recipes, and we only know one of them in Beiping, using materials that can be collected in large quantities nearby. A few years ago, the general soldiers of Yulin wrote to their father to ask for cement recipes, because several of their guard posts there were in disrepair and needed to be rebuilt.

"It was built with cement 60 years ago, and there was a craftsman whose family had been craftsmen in the Yulin Army for generations, and he passed down a cement formula from generation to generation, and built several posts very strongly. Unfortunately, he had already passed away, and although his son inherited his craft, he died unexpectedly early, leaving no heirs, and the recipe was lost. The general army of Yulin wanted to rebuild the sentry post, but when he turned around, he found that there was no way, so he could only borrow it from Beiping. My father is naturally not stingy, but the cement recipe used in Beiping is very different from that used in Yulin, and there is a difference in the material alone! If Yulin had used the recipe from Beiping to rebuild the outpost, not only would it not be as strong as the original, but it would also cost much more than the previous repair, because some materials had to be transported from afar. ”

Xie Mulin vaguely heard his father Xie Pu mention this in his family letter: "There should be a lot of loess in the local area, right?" It is cheaper and more cost-effective to use loess to make cement. ”

The county lord of Yongping clasped his palms together and smiled: "Exactly! Sure enough, my sister-in-law had heard about it. At that time, my father couldn't do anything about it, Beiping used that cement recipe for generations, and the local materials in Yulin were insufficient, so they could only be transported from outside, so what could my father do? In the end, Xie Fantai came up with a yellow cement recipe, which could be made from local ready-made and cheap materials, so that the Yulin General Army didn't have to worry about it anymore. ”

Xie Mulin was a little curious: "I didn't inquire about the follow-up of this matter." Did my father's recipe really come in handy? ”

The county lord of Yongping nodded and said: "If you can use it, it will save a lot of things, but after the sentry post is built, it is still not as strong as the original, and it is estimated that it can last for twenty years." But it doesn't matter, today's new recipe is convenient and practical, and it doesn't cost much silver, and it doesn't matter if Yulinwei rebuilds their sentry post again after 20 years. I don't know what the mystery of the cement recipe inherited from the family has been a craftsman for generations, but it's a pity that it's lost! ”

Xie Mulin sighed: "Such a versatile and cheap formula should not be regarded as a secret of a family, passed down from generation to generation, if it spreads early, how can it be completely lost because something happened to the descendants of a family?" ”

The county lord of Yongping smiled and glanced at the four princes: "No way, even if it is in our Beiping, it is not good to openly publicize it with cement recipes, and the craftsmen who know the formula are probably afraid that they will dislike the imperial court, right?" Moreover, if only their family knows about such things, then they will not have to worry about losing their livelihood for generations. This is also where the selfishness of the craftsman lies. ”

Xie Mulin smiled. The selfishness of the craftsman or something...... If it is their own formula, then it is reasonable to keep it secret for selfish reasons, and at most it can only be said that the inventor pattern is smaller. But most of the cement formulas were passed down by Emperor Taizong who crossed over, and there was no secret at that time. Even after so many years, there are not many people who still know about cement formulas, but it is not appropriate to treat other people's things as their own private property and ignore the public interest. Thanks to the fact that the craftsman has been serving in Yulin for generations, didn't he consider the safety of the local defenders at all? The successive generals of Yulinwei were too careless, and let the craftsman keep the cement recipe secret, and it was only sixty years later that a general soldier proposed to rebuild the sentry......

Xie Mulin didn't comment much on Yu Linwei's situation, but the fourth prince was very sensitive to the gaze of the county lord of Yongping: "Sister Pei, I can't do this kind of thing. But I know that cement formulations are good stuff. Emperor Taizong is also the premier monarch of this dynasty! ”

This answer was quite satisfactory to the county lord of Yongping, she curled the corners of her mouth, turned her head to Xie Mulin and said, "Sister-in-law, I heard that there are several cement formulas in Xie Fantai, but not all of them are suitable for Beiping. My father knew, but he wouldn't tell me, and I had nowhere to ask. I see it's in your notebook, can you borrow it and read it? Can I use that? In fact, there are also places where cement needs to be used......"

Xie Mulin understood, and said with a smile: "Yes, but whatever recipes you can find here with me, you can only use them." In fact, these things are very useful, and it is a pity that they cannot be promoted! If the county lord is willing to take the lead in promoting, as long as it helps the people's livelihood, I can't wait for it! ”

The lord of Yongping was overjoyed. The fourth prince turned his head to look at Xie Mulin, blinked, and immediately sat up a little straighter: "Sister-in-law Gao Yi." ”

Xie Mulin smiled and waved his hand, and asked him again, "I don't know what notes the Fourth Highness is interested in me?" Is it a textile machine? I still have a complete and detailed loom structure here, do you want to see the four highnesses? ”

The eyes of the four princes suddenly lit up.