After Zhong Yutang finished talking with Lu Shu, he returned to the refining building to observe the situation, after all, Lu Shu used the students as donkeys like this, and it was difficult for Zhong Yutang to ensure that the students had no negative emotions.

However, what he didn't know was that what Lu Shu wanted was negative emotion points, and he even began to imagine how many negative emotions he would provide him with when the other refining majors of the six major cultivation academies arrived.

Ouyang Lishang was patrolling in the operation room, in fact, the tide was not big, so the modeling work of the 7 fragments was not very difficult, but the difficulty was accuracy.

Accuracy has always been Ouyang Lishang's proudest thing, which requires steady hands and poisonous eyes, and many refiners are far worse than Ouyang Lishang.

No drinking, no smoking pouches, no bad habits, this is the requirement of Lu Zhou refiner, because these mentally-stimulating items will limit the stability of a refiner's fingers, which is a big taboo!

For such a thing as the tide of the world, the 7 pieces of fragments must be tightly fitted, so Ouyang Lishang did not have much hope for these apprentices to refine the tide of the world.

However, when he put forward his needs, Ouyang Lishang suddenly found that these apprentices and even Zhong Yutang had never taken modeling to heart, as if modeling was just the simplest step in refining the tide of the world......

Then, the next day, he saw Zhong Yutang commanding a large group of people to drive a vehicle and pull over a large number of precision instruments that he didn't know, the apprentices seemed to be quite familiar with these instruments, but Ouyang Lishang was embarrassed to ask for a while.

Zhong Yutang looked at Ouyang Lishang after unloading and installing the instrument: "Master, how much error is allowed in our casting mold?"

Ouyang Lishang said proudly: "Don't exceed three tenths of a millimeter!"

To tell the truth, what Ouyang Lishang admires most about the old god king is actually the courage of the old god king to unify currency and weights and measures.

1 millimeter is 1000 microns, that is, the error of this casting mold, can not exceed 300 microns, seven pieces of fragments are connected and stabilized by the engraved French seal, more than this 0.3 mm, the French seal will have no effect, but the smaller the error, the more powerful and stable the tide of the world.

Zhong Yutang was stunned for a long time, looked at Ouyang Lishang and said, "0.3 mm, will this error be a bit too big?"

Ouyang Lishang: "???"

This is probably the difference between the machine and the human hand, Ouyang Lishang They have always used the human eye to identify the mold, and the human hand to improve, so it is really amazing to be able to maintain an error of 0.3 mm.

In the past, some masters liked to drink, and they could no longer guarantee the accuracy of the casting mold, so they could only recruit some talented apprentices to specialize in this kind of thing, and even developed a new industry, but the error of 0.3 mm is still very few people do it.

And now, Zhong Yutang and the instruments they have come into contact with, the error of 0.1 mm is the starting point, and whenever there are three words of finishing in the document, the error of more than this number means failure.

Ouyang Lishang was very uncomfortable, but he didn't want to admit defeat, he suddenly said: "This is the size for apprentices, I'm not afraid that they won't be able to complete it, if you can be more accurate, of course it will be better!"

Then Ouyang Lishang wanted to see Zhong Yutang's reaction, but Zhong Yutang suddenly frowned and said to the person next to him: "This is a major matter explained by Luo on the ninth day, you must ensure that the error of 0.05 mm is achieved, this is a death order!"

Ouyang Lishang thought to himself that you earthlings can really brag, but the person next to Zhong Yutang smiled: "Don't worry, although the time is short, our equipment can achieve 0.03 mm." ”

In fact, even ordinary earthlings would think that the accuracy of 0.3 mm is very powerful, but Zhong Yutang's position is destined that all their standards will not be on par with civilian industry.

Ouyang Lishang was completely silent next to him, he knew that if Zhong Yutang was serious, then if these equipment were taken to Lu Zhou, it was very likely that they would directly eliminate an industry......

But let's be honest, it's all too common on Earth for an industry to suddenly be eliminated overnight, and as long as the pace of technological innovation is progressing, then this kind of thing will continue to happen.

All people must continue to make progress in this era to ensure that they will not be abandoned by the times.

Ouyang Lishang drew the drawings of the tide of the world and handed them to Zhong Yutang, and the first mold was presented in front of Ouyang Lishang's eyes three days later, 4 days faster than he imagined.

At this time, he hadn't even taught the students how to engrave the seals......

Zhong Yutang waited anxiously for Ouyang Lishang to check the mold, and at this time Ouyang Lishang found that this group of players really didn't brag, this mold was really perfect!

I don't know why Ouyang Lishang is a little lonely, it was this skill that he relied on to stand out from the other apprentices and become the master's closed disciple, but now this skill is no longer worth mentioning in front of the machine.

Ouyang Lishang adjusted his mood and looked at Zhong Yutang: "Meet the standards, let's start work, the king is still waiting!"

The tide of the world is finally about to see the light of day again.

Zhang Weiyu and these people don't have much to do, and they have been guarding outside the refining building every day recently, wanting to get first-hand information the moment the first tide is cast.

For ordinary people, the tide of the world is a very powerful magic weapon, but for Zhang Weiyu, the tide of the world is a kind of faith, representing the gift of the old god king.

The refining building was steaming, everyone was wearing thick protective clothing, and the students were tired and sweaty, and they simply regretted their worship of the Ninth Heavenly Luo......

Zhong Yutang said in his heart that it was not a matter of letting the students accumulate resentment against Lu Shu, and that he, the great housekeeper, also had to play a role, so he specially found the students of the Seven Great Cultivation Academies and said earnestly: "Why did Luo make you so tired on the ninth day? I don't hope you can quickly master the refining weapon inheritance? The time creates heroes, and there is not much time left for you!" Our war with Lu Zhou may start at any time, at this time, why don't you understand the painstaking efforts of the ninth day Luo, he finally found the refining inheritance, and you still complain about him......?

The eyes of the students in front of Zhong Yutang were red with guilt, and someone wiped a handful of tears and said, "It's our mistake that our consciousness is too low!"

Lu Shu, who was lying on the sofa watching TV in the bungalow on Xingting Road, suddenly sat up and gritted his teeth and said, "Zhong Yutang, I am inseparable from you!"