Mo Mo stayed in the imperial capital for a few days and returned to Shenzhen on July 21.

In the imperial capital, it is really inconvenient for him to travel through the other world, and he must return to Earth before dawn every day, otherwise it will be troublesome for his family to find him.

He's not with his parents, and it's okay if he doesn't answer the phone once in a while, so it's easy to make excuses. If he lives with his parents, he is in another world, and the ghost knows what happened on the earth.

This time I went back to Shenzhen City, mainly because there were a lot of things in the other world.

In the early morning of the next day, Mo Mo traveled to the other world.

Coming to the spiritual spring last time, Mo Mo looked at the spiritual pool surrounded by mist, and the color of the pool water was almost the same as when he soaked it, it seemed that it would not be long before he could continue to soak again, but unfortunately this spiritual pool liquid could no longer improve his strength.

Mo Mo squatted down and stirred the pool water, the milky white pool water fluorescently sparkling in the morning light.

Mo Mo thought to himself, when the carpenters were free, they would simply build a special warehouse for themselves at the foot of the mountain, so as to hide the spirit pool and cover it for protection. Otherwise, one day, this place will definitely be discovered by the villagers, and if he does not intend to destroy him, he will lose a lot.

Mo Mo was just about to leave, there were a few "whoop" cries in his ears, and when he looked back, he saw the colorful fox jumping down from the top of the mountain, only to see a figure passing in the air, and in the blink of an eye, he stood up, and screamed with his teeth and claws on his front limbs, expressing his inner dissatisfaction.

"Well, I owe you grilled fish. Mo Mo looked at the movements of the colorful fox and probably knew what it was thinking.

Two and a half hours later, on the grassland, a man and a fox lay on the grass to bask in the sun after eating grilled fish.

Mo Mo cocked Erlang's legs, chewed the grass roots, squinted his eyes, enjoyed the feeling of the warm sun, his whole body was warm, smelling the aroma of grass and trees, and thought that this kind of life was not bad. It would be even more beautiful if you built a wooden house by the river, where you could catch fish, swim in the river, and plant some flowers and plants around the wooden house.

Mo Mo's whole body relaxed, his imagination flowed, he covered his eyes with a few large leaves, and fell asleep unconsciously.

I don't know how long later, a small insect jumped on Mo Mo's nose, Mo Mo felt a little itchy, and waved his hand impatiently, the leaves fell with the wind, the dazzling light shone into his eyes, and he woke up. When he opened his eyes, he found that the colored fox was asleep on his stomach, sat up, patted its waist, and the colorful fox lazily flipped his lower body and opened his eyes.

Mo Mo looked at the sky, at this time the sun was hanging, he should have left, stood up and stretched.

Caihu seemed to know that Mo Mo would not stay here for too long, maybe he was used to being lonely, he screamed a few times, and left first, and disappeared from Mo Mo's field of vision after a while.

Mo Mo photographed the horse sleeping soundly by the river, and the horse neighed a few times dissatisfied, but he still couldn't resist the master, shook off the dust on his body, and squatted down slightly to let the master get on the horse.

Mo Mo rode back to the carpenter's house, saw Wang Jianshu, and heard him say that a waterwheel had been installed and that the sawing machine could be installed at any time.

When the two came to the river, they looked away from afar, and they could see that the dam surrounded by stones was several meters high and twenty or thirty meters long, and Mo Mo didn't know how they blocked this stone dam.

Underneath the dam, a wooden waterwheel with a diameter of eight meters has been installed.

There are only a few outlets left in the dam, and the waterwheel "crunch" rapidly under the rapids. According to Wang Jianshu, as long as the water outlet is blocked, the speed of the waterwheel will slowly decrease until it stops rotating.

"Uncle Wang, it's very good, you can install the sawing machine. Mo Mo said happily, he didn't expect them to do it very quickly, and some things just need to be prompted by Wang Jianshu, and he will be able to understand them at all.

"Well, we installed it a few times, it took a whole day. With experience, it will definitely be faster to install a second waterwheel. Wang Jianshu described the installation process, and then asked someone to move out a sawing machine.

The sawing machine is relatively large, in order to ensure the strength, the sawing machine platform is assembled with hardwood boards thick up to more than 20 centimeters, five meters long, two meters wide, and the saw blade is installed in the empty groove in the middle of the platform. The saw blade is connected by a steel shaft, which is mounted on a bearing. As long as the axle of the waterwheel is connected to the steel axle of the sawing machine, the saw blade can be rotated.

The base of the sawing machine is very heavy, which is to prevent the sawing machine from vibrating too much when the saw blade rotates rapidly, and to ensure the stability of the sawing machine.

Half an hour later, the sawing machine was installed under the command of Wang Jianshu, and then asked Mo Mo to inspect it. "Uncle Wang, let people pass the water!" Mo Mo shouted, Wang Jianshu turned his head and asked someone to open the sluice, and the torrent rushed into the blades of the waterwheel, and the waterwheel was instantly driven to rotate, through the rotation of the axle, the simple gearbox, the gear ratio conversion, and finally to the sawing machine.

"Boom ......" The sound of high-speed rotation comes from the saw blade.

"The saw blade is spinning, it's spinning!" shouted the carpenters, who knew what it meant for the saw blade to spin.

"The diameter of the saw blade is 80 cm, the speed reaches 600 revolutions per minute, and the linear speed of the sawtooth reaches 25 m/s, although it is twice as slow as the cutting line speed of the normal sawing machine, but there is no big problem in cutting large wood and controlling the amount of knives. The system quickly analyzed it, and Mo Mo was really happy to get the analysis, but he had to test the car to know.

Wang Jianshu and Mo Mo's eyes were invariably intertwined, Mo Mo nodded, and Wang Jianshu ordered: "Get on the wood, pay attention to safety." ”

The two carpenters who heard the order carried a two-meter-long, adult-hugging thick log to push the saw blade, and the end of the wood had just touched the saw blade, when the sound suddenly changed, and there was a "buzzing" sound, and the wood port suddenly raised wood chips.

"Okay, it's successful!" Wang Jianshu said happily as he watched the wood quickly cut in.

"Don't push too fast, otherwise the blade teeth are easy to break, pour some water on the saw blade, increase lubrication, and cool it down. Mo Mo reminded on the side, he was also very happy, with the sawing machine, it will be faster to cut sawed wood in the future, and it will also solve the problem of difficult processing of wooden boards.

Although the otherworldly sawing machine is not as good as the earth's motor sawing, it can at least be used, and I don't know how many times faster than pure manual sawing.

Mo Mo discussed with Wang Jianshu and planned to install more small water wheels and small sawing machines, and he would solve the parts of the sawing machines.

The bearings, saw blades and other parts that Mo Mo had moved from the earth before were enough to install twenty small sawing machines, but he felt that it was not enough, so when he returned to the deep market, he continued to make large purchases, and then transported them to the other world.

In addition, a larger arrow shaft lathe can be made to solve the problem that arrow shaft processing is still inefficient.

There are many shortcomings in the installation of water wheels by the river, that is, it is not very stable and it is difficult to control the speed.

Mo Mo and Wu Jianshu proposed that a high-level pool could be built near the carpenter's house to store water. The water is transported to the pipes by large water wheels along the river, and then to the large pools. A small waterwheel is installed at the low position of the pool, and the kinetic energy of the low-level waterwheel is converted into the kinetic energy of the low-level waterwheel, and then transmitted to the machine tool.

When the waterwheel is not in use, you can seal the pool water, and it is more convenient to open the sluice gate when you use it, otherwise the machinery has to be installed by the river, and it is really inconvenient to use. Of course, the downside of building a pool is that it's a lot more work.

In short, Mo Mo gave Wang Jianshu a bunch of plans and technical books, and asked him to act according to the plan, so that he was not afraid of doing wrong things.

On the blacksmith's side, Mo Mo went to inspect it, and the blacksmiths were still assisting the carpenter's room to do things, so they studied Mo Mo's iron-making and steel-making technology when they had time, and began to look for the raw materials needed for ironmaking in Caigu.

"Hey, it's not easy!" Mo Mo left the blacksmith's room and sighed with great emotion, with the system, everything is not all smooth sailing.

When the earth culture is popularized in Caigu, he only needs to throw the technical data to the workers and let them study it on their own, and he can take time off to do other things.

However, this is a long process, and it would be nice to be able to popularize culture within five years.