Lin Xianyu's next few days were unusually fulfilling, and every time he kept endorsing, Lin Xianyu even felt that he had become an emotional endorsement machine.

Lin Xianyu kept remembering that he would go out of the study every time he cooked for the three old people.

Originally, he didn't need to be so desperate, but Lin Xianyu thought that he had been away for so long, and his brother didn't know what he would be in a hurry, so he didn't want to waste even a minute of his time.

Under Lin Xianyu's super efforts, it only took five to almost get the codex dossier of the Mo family, the peasant family, and Doctor Li.

Although there are many things that Lin Xianyu can't understand, those knowledge are imprinted in Lin Xianyu's mind.

For example, now, Lin Xianyu has seven or eight ways to improve the bow and crossbow, with the upper spring, but Lin Xianyu is naturally not stupid enough to take out these methods and disclose them.

If she let the court know that she is good at making military equipment, she is afraid that she will not have even a trace of freedom, and she does not want to ask for trouble.

But there is one thing that is very useful, and that is the waterwheel.

Although the waterwheel existed as early as the Eastern Han Dynasty, the previous waterwheel was very simple, and its role was not too large, and it could only be driven by manpower, and it was even difficult to apply it to the practice of Zheng

However, after combining the knowledge of the Mo family and the farmer, coupled with the current knowledge, Lin Xianyu soon had an idea of a new type of waterwheel in his mind, "water turning overturned", "ox turning overturned" or "donkey turning overturned", which could be used interactively according to the wind and terrain.

The "High Drum Car" can be developed in places where the terrain is steep and it is impossible to open the pond, and it can also be transported at a low water and high level.

However, these things are still just a thought in Lin Xianyu's mind, after all, she has not practiced, she just relies on the waterwheel she has seen, and the Mo family and the farmer only have such an idea.

There are all kinds of whimsical ideas, although Lin Xianyu can only rely on the inventions that modern society has seen to reverse it, but it can already have enough effect.

Even the system is a little unhappy, isn't this a lot of opportunities to publish tasks by yourself?

After Lin Xianyu finally mastered it, Doctor Li finally decided to take Lin Xianyu away, he felt that if he stayed any longer, maybe his apprentices would be abducted and shared.

After all, these two shameless old men are envious one by one, and they are changing their methods to give their apprentices all kinds of sugar-coated shells, what kind of medicine are sold in their bones, can they not know?

If they don't leave, when they really pull down their old faces to beg for themselves, and when Lin Xianyu has a really good relationship with them, won't their apprentices be inexplicably going to share it.

Lin Xianyu brought a lot of good things out this time, such as the box she is carrying now, which is made by Mo Lao, unless she knows how to open it, there is absolutely no way to open it.

If you forcibly dismantle it by force, the contents of the box will also turn into ashes.

But in such a precious box, there are a bunch of toys, and then there are all kinds of plant seeds, and all kinds of messy things.

If it weren't for the fear of arousing onlookers, Mo Lao would have sent Lin Xianyu a wooden ox to hurry away.

Doctor Li and Lin Xianyu decisively interrupted Mo Lao's thoughts, Lin Xianyu didn't want to go out and be watched.

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