In the evening, those who had eaten and drunk were gone.

Leave it empty and wait for tomorrow to slowly clean it up.

Go outside and send off Yuan Dake and Zhang Bao. Sun Simiao and Xiao Han walked back from the path side by side, and the bright moon was full in the sky.

"Xiao Han, what's going on today? What's the matter with you? Sun Simiao thought about it for a long time, but still asked the same question as Yuan Dake.

Xiao Han shrugged his shoulders and said casually: "It's okay, it's just that I haven't seen each other for a few days, let's get together and catch up on the old days." ”

"Inviting them is just to catch up, nothing else?" Sun Simiao looked at Xiao Han with some suspicion, as if he didn't believe it.

People who are too smart are like this, every little thing others do, every step they take, seems to them to have another meaning.

So much so that many misunderstandings in reality are all figured out by these smart people themselves.

"What can I mean, an idle marquis, Chang'an is about to forget me now." Xiao Han grinned, but he didn't look frustrated.

Without seeing anything from Xiao Han's face, Sun Simiao shook his head and smiled. decided that this was Xiao Han and didn't say it, but he didn't bother to explore.

"By the way, I found a place from the edge of the Qinling Mountains, which is very similar to the place where you found the Sanqi Cong. The notoginseng we carried back were planted, and if they survived, the big cow would go to Qinling again, dig up the remaining notoginseng and medicinal herbs, and plant them together. If everything goes well, there are two years of hard work, and this herb will become large-scale. Sun Simiao changed the topic and told Xiao Han about the Sanqi brought back from Qinling, after all, Xiao Han also made a lot of efforts for them, and he should know these things.

Xiao Han heard it, but just nodded indifferently. In his mind, as long as he is not allowed to go to that ghost place again, the other Sun Simiao will toss as much as he likes!

Slowly walked two steps forward, and seeing that Xiao Han didn't speak, Sun Simiao looked up at Qinling in the distance and said, "Also, in two days, I am going to move to Qinling with Da Niu, and I will also take good care of medicinal materials." ”

"Oh......"

Xiao Han didn't pay attention to this sentence at first, and was still nodding habitually.

But when he clicked and clicked, he suddenly felt that something was wrong, and then chewed what Sun Simiao had just said again, and a spirit almost jumped up from the ground: "What? Are you moving to Qinling?

Sun Simiao didn't expect Xiao Han's reaction to be so violent, but he was startled by him at night, and then stroked his chest and said unhappily: "What are you doing?" Surprised! These medicinal materials are so precious, how can they be made without anyone to take care of them? ”

"Then you don't have to go yourself!" Xiao Han is in a hurry! Pointing in the direction of Qinling, he said, "What if I encounter a one-horned rhinoceros again, or a tiger or leopard?" No, no, it's too dangerous! ”

Sun Simiao looked at Xiao Han's worried face, a little moved, coughed twice, and said, "Actually, you don't have to worry too much about this. We chose the edge of the Qinling Mountains this time! There won't be the ones you said. ”

Xiao Han glared at Sun Simiao and waved his hand fiercely: "That's not possible! A few days ago, a wild boar was killed in this neighborhood, don't you see that walls are being built everywhere now? It's just that I'm afraid of the beasts from the Qinling Mountains. ”

Xiao Han was really anxious, especially after experiencing Qinling in person, he was even more afraid that Sun Simiao would have an accident in Qinling!

Moreover, in Xiao Han's heart, not to mention the friendship between him and Sun Simiao, which is similar to a year-old friendship. Even in medicine, Sun Simiao can't tolerate losses, this microcosm has just started, if people are gone, where will Xiao Han cry?

"I don't agree with this anyway! We have people here who are more familiar with Qinling than you, for example, that sixth son is very good! Recruit a few more people tomorrow, they will definitely be more professional than you and Da Niu! Besides, if someone in the vicinity has a headache and brain fever, they still have to run to Qinling to find you? Is hemp not troublesome? What if I don't find you and let the beast take you away? ”

Taking advantage of Sun Simiao's undecided decision, Xiao Han said something bad and finally dispelled Sun Simiao's idea. Send him back, until the door is closed, Xiao Han looked up at the bright moon in the sky, and sighed: "Hey, what is this called, one by one, it doesn't make people live in peace." ”

Sunset and sunrise, time is still the same.

Xiao Han, who returned home, finally got his wish and lived a life of a pig who was full of food and sleep, and full of sleep.

Compass.

This thing was made two days ago.

Xiao Han originally thought that the magnet was not easy to find, but as soon as he told Sun Simiao, he went back and picked up two pieces from the medicine box and threw them at Xiao Han's feet.

Looking at these two palm-sized magnets, Xiao Han's eyes were about to fall out! chased after Sun Simiao's ass and asked for a long time, only then did he know that it was still a medicinal herb.

I thought it was very strange to use rhino horn as a medicinal material, but I didn't expect this stone to be used in medicine!

Xiao Han couldn't help but be in awe of the great medical martyrs, but I don't know how the first person who discovered that they could be used in medicine tried it? Is it the same as Shennong, just bite with your mouth? Can you gnaw?

I can't figure it out, and I can't think about it anymore! If you think about it again, your teeth will be sore.

Roll up your sleeves, knock the magnet into small pieces, grind it into a slender prism, and hold a copper needle in the middle, and the simple version of the compass is complete!

No matter how it turns, the prismatic magnet is still stubbornly pointing south under the powerful laws of physics! The onlookers were so shocked that their jaws almost dropped! The eyes that looked at Xiao Han one by one became more and more awe-inspiring!

However, Xiao Han is still not satisfied with this! Because it is too inconvenient to carry, a light touch, either the magnet has fallen, or the needle has fallen!

Originally, he went for the quality of military supplies, but now that he is like this, he can't let the generals fight half of the war, so let's stop looking for parts first......

Improve, must improve!

I found a coppersmith, turned a lot of copper coins in one go, and made a bunch of shallow small round cups.

Regardless of the coppersmith's puzzled eyes, Xiao Han instructed him to weld a special thimble in the middle of the cup.

The magnetic needle was perforated in the middle, fixed on the copper needle, and then filled with clear oil, and the lid originally wanted to be made of glass, but Xiao Han couldn't wait, so he turned out the remaining crystal scraps before and attached it to the copper cup with fish glue.

A military version of the compass that will not fail no matter how it is flipped is formed.

happily took the newly made compass to show off in front of Sun Simiao, but came back empty-handed......

This old way is even more shameless than a robber!

As soon as he went up the mountain to collect medicine, he snatched the compass from Xiao Han's hand with peace of mind, and he was embarrassed to help Da Niu ask for one......

Huff back to the workshop and start making again according to the steps just now!

Fortunately, there are still a lot of magnets left in the copper cup, and the only thing that is not enough is the crystal piece. Wait for Xiao Han to write to Chang'an and ask him to send glass pieces here.

The remade compass was left two by himself, and the rest of the brains were packed and sent to Li Shimin, hoping that these gadgets could help him a little.