Yan Yan didn't know anything about what happened to the Lu family, she was busy studying the threshing machine these days, and more and more rice was planted in the Zhuangzi, and rice was not like wheat, which could be threshed by grinding with a mill like wheat field, and had to be beaten with a wooden barrel or directly by hand, which was a rather time-consuming and laborious job.

For this reason, Yan Yan thought of a threshing machine, but unfortunately, she had only seen this kind of thing in general terms, and had not used it personally, and she was not very familiar with its working principle, but it was clear that it was to use the rotation of the shaft to drive the threshing of rice ears.

After making up her mind, Yan Yan ordered someone to find Master Yang from the Ministry of Works, she said that she wanted to make a rice thresher, at that time there was already a windmill, there was also a waterwheel, both of which used gears to rotate to work, but the windmill was kept shaking by hand, and the waterwheel was powered by water or wind, of course, it could also rely on manpower, so Yan Yan bluntly said that he was inspired by the windmill and waterwheel and wanted to make a thresher.

Yan Yan only provided an idea, but also drew a simple style, after Master Yang read Yan Yan's drawings, he made a special trip to Zhuangzi to study windmills and waterwheels, and after coming back, he found two carpenters, and it took almost a month to finally make the barrel and shaft of the threshing machine, which is also hand-cranked, requiring two people to keep shaking the handles on both sides of the barrel.

Seeing this, Yan Yan put forward another idea, saying that it was possible to make a foot pedal, so that two laborers could be saved, because the foot could be stepped on at the same time as the hand could be sent into the threshing of rice.

Master Yang listened to Yan Yan's idea and pondered for half a month, but unfortunately this time it didn't have much effect, and finally Yan Yan proposed to use the conveyor belt to drive the gear, and then drive the shaft through the gear to work, because there is no plastic, the conveyor belt can only be replaced by pigskin, cowhide or sheepskin.

Cowhides were relatively scarce, because cows could not be slaughtered easily, so Yan Yan's first choice was sheepskin and pigskin, and soon Zhou Haisheng sent these two things from Zhuangzi, and Yan Yan handed them over to Master Yang and the two craftsmen.

Another month later, the first real foot-operated threshing machine came out, Yan Yan was overjoyed, although he had missed the rice harvest season, Yan Yan still ordered someone to make ten units, which were used in the threshing of sorghum.

After Yan Yan witnessed this moment, he quickly sent a letter to the palace, and after Li Cong learned the news, he personally took the prince and the officials of the Ministry of Industry to Mingzhuang outside the city, and watched the farmers send the cut sorghum into the threshing machine and turn it a few times, and then take out the sorghum stalks that are cleaner than those made by hand.

"Yan'er, how did you come up with this?" Li Cong knew that everyone was curious about this, so he still had to ask.

"The main hero is Master Yang, I just came up with an idea, I saw that everyone is really hard, and I have been thinking about whether there is any way to improve it, but it happened that I saw the waterwheel in the Zhuangzi that day, thinking of the windmill they used, I found Master Yang, and the rest is the credit of Master Yang." Yan Yan pushed Master Yang out.

Master Yang waved his hand again and again after hearing this, "Several key points were thought out by the lord of Baihui County, and the lower official is a hands-on one." ”

Li Cong believed this, thinking of the previous artillery, and then the previous yams, potatoes and cotton, and cotton textiles, etc., Li Cong became more and more suspicious that Yan Yan had some adventures, and that she had met some noble person on the Huangquan Road.

Of course, suspicion is suspicion, Li Cong will never ask this, because he knows that if he asks, he will ask in vain, and maybe he will scare Yan Yan back, and he will dare to share his worries in the future.

Therefore, after listening to Master Yang's words, Li Cong waved his hand, "Both of you are meritorious heroes, and you should both be rewarded." ”

The final result was that Master Yang was promoted to one level and awarded Yan Yan a thousand taels of gold, and the names of both were written into the historical records, and soon, Yan Yan's name spread all over the capital.

Because Yan Yan rejected the thousand taels of gold, she applied for a patent for this threshing machine and prepared to sell it nationwide.

Li Cong agreed.

Subsequently, Yan Yan really sent people to sell threshing machines all over the country, but she did not open her own store, but made a sample every way, and then found the most famous local merchant with only strength, and sold the sample to him at a price of 10,000 yuan after demonstrating it on the spot, signed an agreement, and only sold one along the way, and his products could only be sold in the jurisdiction where he was located.

Along with this threshing machine, Yan Yan's mahjong and her yams and cotton seeds are also sold, mahjong she didn't dare to sell at such a high price, the family only needs a thousand yuan, and the yams and cotton seeds are half sold and half given.

Because Yan Yan's subordinates were holding Yan Yan's name card, the name of the lord of Baihui, and the royal backer, Yan Yan's threshing machine and mahjong were sold for 2.67 million yuan, and after removing various expenses, Yan Yan got 250,000 yuan tickets.

This does not include the income of self-operated stores in the capital.

With this money, Yan Yan set out to build a ship, and when the war was over, she wanted to do maritime trade.

Of course, that's for later.

Now that Yan Yan was busy with this threshing machine, he knew that Yan Yu had really given birth to a son, and the Lu family was ready to feast on guests.

Because there has been no movement on Yan Yan's side, Mrs. Lu hesitated for two days, and personally entered the Ming Garden three days before the child's full moon, she came to invite Yan Yan to attend the child's full moon banquet, but Yan Yan refused.

"Do you know that the girl from the Zhou family is pregnant again?" Seeing that Yan Yan didn't have to discuss, the old lady changed the topic.

Yan Yan shook her head, she never took the initiative to inquire about the news of the Lu family, unless something big happened to the Lu family, such as Yan Yu giving birth to a child, the Lu family was full of guests, and the news quickly spread in the streets, whether it was a restaurant or an embroidery village, and even people talked about it in the streets and alleys, so it was difficult for Yan Yan to think about it.

But Zhou Wan is a concubine after all, and she doesn't go out, and no one cares if she is pregnant or not, and it can't cause heat, so Yan Yan naturally has no way of knowing.

However, what made her more curious was why Mrs. Lu only mentioned this matter, if she remembered correctly, Lu Ming had only been home for more than two months, so even if Zhou Wan was pregnant, it was less than three months, and the fetus had not yet sat down, in this case, there was no need to talk about it.

"I can't complain that you don't know, you won't enter the Lu family now." Old Lady Lu saw Yan Yan shake her head and sighed.

She remembered the days when Yan Yan was sick, and missed Yan Yan's intentions for her at that time, not only caring about what she ate, but also playing with her and laughing. Although Yan Yu will accompany her every day, after all, she is not as intimate as Yan Yanlai, nor is she as attentive as Yan Yan.

But there was no way, despite this, she still had to think about it for Yan Yu.