"How much? Fifty years? Then I just found a nest of marmots and dug them up for me for 50 years, and it will take 50 years to employ people? After Zhang Nan finished expressing his contempt, he walked forward on his own, leaving Mo Zu standing in the secret room messy.

Although Mozu doesn't know what a groundhog is, but with the word "rat", Mozu knows that what Zhang Nan said is not a good thing, but now Mozu is too lazy to worry about Zhang Nan, and now Mozu just wants to take Zhang Nan to see a few untight treasures, and then take Zhang Nan out of the secret room.

Mo Zu took Zhang Nan to the first secret room first, Mo Zu touched around the wall, and Zhang Nan felt a little obscene, but the door was opened without warning.

"Let's go, let's take you to see the first treasure of our Momen." After Mo Zu finished speaking, he walked in.

Zhang Nan entered the secret room, only to find that there was an everlasting lamp in this secret room, although there was no sunlight in the secret room, but there was no dark feeling at all.

Zhang Nan walked into the secret room and began to look inside the secret room. I saw that there was something in the center of the secret room that Zhang Nan couldn't say, and Zhang Nan felt that this thing looked like a wooden cow and a flowing horse, but he couldn't be sure.

"This ...... Is it difficult to be a wooden cow and a horse? Zhang Nan asked.

"Oh? Boy, do you see that? Mozu looked at Zhang Nan with a little appreciation, and it could be seen that Mozu was appreciative because of Zhang Nan's knowledge.

"I can see your sister, I'm guessing, this ugly thing can also be a wooden ox and a flowing horse that has been passed down for thousands of years?" Zhang Nan complained fiercely in his heart, but Zhang Nan didn't say it, but asked to continue to look down.

Then Mozu took Zhang Nan to visit the next secret room, but the contents of this secret room aroused Zhang Nan's interest.

In the center of the second chamber was a plough similar to a curved plow, but it looked different from what Zhang Nan had seen in his textbooks, and Zhang Nan remembered that his high school history textbook wrote "a light and short curved plow, also known as the Jiangdong plow." It first appeared in the Jiangdong region in the late Tang Dynasty, and its appearance was a sign of the maturity of ancient Chinese farming tools. ”

It seems that the appearance of the Quyuan plough has more or less something to do with Momen, and even this Quyuan plough may be revealed by Momen to benefit the people of the Tang Dynasty. Thinking of this, Zhang Nan couldn't help but feel a little more good in his heart for this wrinkled Mozu, after all, Momen had not forgotten the people of the world.

However, after the second room, Zhang Nan didn't have any interest in looking at it anymore, because of the machinery in the remaining houses, Zhang Nan could only reluctantly call them machines, and these machines had no use value at all in Zhang Nan's opinion, so Zhang Nan's interest in seeing them was not very great.

After visiting eight secret rooms in a row, Zhang Nan was not only interested in the things in one or two secret rooms, but the rest of the things were simply a waste of Zhang Nan's time.

Just as Zhang Nan was about to head towards the ninth secret room, he was stopped by Mo Zu.

"Boy, I've visited eight secret rooms with a face, and I've seen almost all of these treasures, can I let my old man also see the treasures you have traversed." Mozu Road.

"Isn't there another house?" Zhang Nan pointed to the ninth secret room.

"This ......" Mo Zu looked a little embarrassed, obviously not wanting Zhang Nan to see the ninth secret room.

"The ancestors have been trained, and the head of the Momen is qualified to enter this ninth secret room, so this secret room can't be seen by you." Mozu Road.

"Can it still be like this?" After listening to it, Zhang Nan didn't force it, after all, rules are rules, Zhang Nan doesn't have the habit of forcing people, besides, after reading the first eight secret rooms, Zhang Nan didn't have any expectations for the things in the ninth secret room.

Zhang Nan followed Mo Zu out of the secret passage, and after returning to the house, Mo Zu buckled the bed three more times, and the bed automatically closed again.

"How about it, boy, the treasures of our ink gate have opened your eyes, and now it's time for my old man to see how clever you are at passing through a gate that preceded my ink gate." Mozu said.

Zhang Nan said with a smile: "It's not that I said, it's more than a thousand years, it's really lifting up your Momen, in my opinion, the treasures I just saw are only of some use to the things in the first and second secret rooms, and the rest have no practical value at all." ”

"Practical value? What does this mean? Mo Zu obviously couldn't accept Zhang Nan's new vocabulary.

"Let's take a simple example, for example, the thing in the third secret room, I guess it should be a weapon, and it's a siege weapon." Zhang Nan said.

"That's right." Mo Zu nodded and acknowledged.

"But this siege machine has no practical value at all, in my opinion, it is useless to spend so much money to create such a nondescript thing, that siege machine simply replaced the wood on the crash car with iron, and then added some more things, didn't I say, can such a heavy thing run away on the battlefield? It is simply unimaginable how much it would cost the soldiers to advance with such a behemoth, so I say that this thing has no practical value. Zhang Nan said.

Mo Zu was silent for a long time, and then said, "Is it so difficult that this thing is useless at all?" ”

"This, it's not that there is no use for force, it's just that this thing lacks a suitable thing to be its power drive, and to attack the city with such a large weapon, it is not possible to rely on manpower alone." Zhang Nan said.

"I know this, so this thing is pulled by horses." Mozu Road.

"No, no, no, we need more power, horses are still driven by living creatures after all, and if there are not enough horses, this thing is still a waste on the battlefield." Zhang Nan said.

After listening to Zhang Nan's words, Mo Zu quickly grasped the key word "living creature" in his words.

"Is it possible to drive something that is so hard that it is dead? Is it true that what is recorded in the ancient books is so difficult? Mozu muttered to himself.

"What?" Zhang Nan didn't hear Mozu's words and asked.

"Nothing? So what exactly is this dead thing that can be used to drive? Mo Zu looked like he was humbly asking for advice.

"Well, this involves the treasure we pass through a door, let me talk about it in detail." After Zhang Nan finished speaking, he walked around Mozu's inner room and found that the kettle with boiling water next to Mozu's bed was open, and the steam urged the lid of the kettle to tremble constantly.

After Zhang Nan saw it, he said with a smile: "This answer is in your old room Mozu, but it's a pity, Mozu you never paid attention to it." ”