In ancient times, men gave women hairpins, probably the same as modern rings, which implied that layer of convention.

Of course, Su Jinluan didn't want to accept it.

"This, this is too precious for me to accept."

Su Jinluan relied on small sales, or relied on soil to sell land, and he thought that he was a country girl who had never seen the world, and he was frightened by this precious treasure, and he resigned again and again.

Yuan Changgeng squinted slightly, and did not dismantle her Gu left and right to talk about him, and said simply:

"In more than a year, it will be your gift, and I may not be able to come back in time to give you the gift first."

This cannot be pondered. What Yuan Changgeng is going to do on this trip, Su Jinluan knows in his heart.

But when I accept it so vaguely, I always feel a little hot to hold.

If you don't take it, you can't bear it.

Fighting a war will kill people, not to mention the Jinyi Wei spy who wants to lurk the enemy army of the enemy country to find out the intelligence.

Su Jinluan restrained the expression of pretending to be stupid on his face and sat silently.

Yuan Changgeng didn't urge her, took the breakfast brought by Fangcao and ate it in a big gulp.

"You'll be back safe."

After a long time, Su Jinluan heard himself say.

"When the time comes, if you want to give me something, you can talk about it then."

She seemed to be saying tongue twisters, and she didn't know if she had made it clear.

She tried to smile at him, restraining herself from taking advantage of the opportunity to do some selfish blackmail.

He is about to sacrifice his life and death for the country and the people, at least she can't hold back and make the hero bleed and cry or something.

Yuan Changgeng frowned slightly, and suddenly reached over and touched her forehead.

"You're having a fever."

Su Jinluan avoided it, his smile was a little hazy, but his eyes were still clear.

"It's just that I didn't rest last night, just stay and get a good night's sleep."

She pointed to the cloth bag brought by the herb, and her spirits were high again.

"I made you something."

She opened the cloth pouch with great interest and took out the same treasure as it was.

"This is the dry food I tried to make, and it is suitable for long-distance marches."

"This is fried noodles, which are made of fried grains and grains, salted and other seasonings, and chopped dried vegetables, which can be washed with water when eating, which is very convenient."

"Of course, when the conditions are more difficult, you can directly take a bite of snow and a bite of fried noodles, which can also resist hunger and maintain physical strength."

"The biggest advantage is that it is easy to preserve, and if the weather is hot, it can be stored for at least ten days and half a month. The disadvantage is that it is scented, and it may be sniffed out and robbed by mastiffs and beasts when carried around, which is not conducive to hiding. ”

"Would you like to try it? This bag was fried in sesame oil, specially prepared for you, tried it all night, and felt that this ratio tasted the best. ”

Yuan Changgeng was moved, took the heavy cloth bag, and smelled the fragrant smell before he opened it, which was coveted.

He opened the cloth bag, the fragrance was stronger, the burnt brown flour was mixed with all kinds of fine particles, there were chopped dried beans, radish strips, shredded cabbage, and green and yellow beans, fried to a crispy appearance, very tempting.

Yuan Changgeng reached out and grabbed a mouthful, chewed it a few times, swallowed it with great effort, and approved:

"Not bad."

Fangcao hurriedly brought tea to him, with a proud face.

"Make a bowl and eat it."

Yuan Changgeng commanded, and Fangcao responded.

"Soak in boiling water."

Su Jinluan advised, and then introduced the second thing.

"You've seen this, the filtration device, I've made a small improvement. You must pay attention to hygiene when using water in the wild, and if you can, you must drink boiling water, and use this filter before drinking raw water. ”

She took out a large wooden barrel and a small bamboo tube, and the bottom was all made of simple design, and washed pebbles, coarse sand, and fine sand were put in to filter layer by layer.

"Don't be too troublesome, there are a lot of things in the water in the wild that are invisible to the naked eye, and you will get sick if you drink it, such as water and soil adaptation, diarrhea, etc., it doesn't hurt to pay attention to it."

Yuan Changgeng took it silently, saw her like a little hamster, and took out the baby again.

"This is called a mask, and you can put all kinds of medicine bags in the two-layer cloth, such as refreshing your mind, preventing heat stroke, preventing smoking, and so on."

Su Jinluan took a large mask and hung it on his ears, signaling how to wear it.

"Of course, even if you don't put anything, masks also have the effect of protecting against cold, sheltering, and filtering breath. If someone is sick, wearing a mask can prevent illness, but the symptoms are not cured, and the medicine still needs to be eaten. ”

She took off her mask and continued:

"Charcoal and plant ash are good things, charcoal has an excellent filtering effect, made into small pieces can be used to filter poisonous gas miasma, I don't have time to test the specifics, you remember this, it should be very useful."

"Grass ash can be cleaned, and when there is a lack of medicine, it can be used to recharge and relieve the symptoms of gastrointestinal discomfort, such as gastric acid, acid reflux water, etc., and can also be used as a disinfection and hemostasis for traumatic wounds."

"Of course, this is all a backup plan, use the right medicine and herbs, don't use it. If you disinfect the wound, the spirits will work, and I will give you the recipe before. ”

Su Jinluan watched with some embarrassment as Yuan Changgeng put on the mask she had just taken off, his eyes swept over the bulging part in the center of the mask, and his face was a little hot.

She looked away, lowered her head and went to dig out the cloth bag again, and muttered quietly:

"Masks should not be used indiscriminately, and it is necessary to pay attention to frequent scalding and disinfection with boiling water."

She coughed uncomfortably, skimming the topic and holding up the gadget in her hand.

"It's not even a semi-finished product. The main thing is that I don't have the right tools at hand, and I'm running out of time, so I drew a diagram, let's take this simple explanation. ”

Su Jinluan's face became serious, holding an irregular crystal piece in his hand, and pointing at the drawing with his other hand.

"Crystal tablets have a wonderful effect. What I want to make, a round one like this, polished to a thick middle and thin edges, is called a convex lens, and the reverse is called a concave lens, and the degree of convex or concave is called the degree. ”

"A single concave lens can help some people with poor vision to see again, and the general symptoms are like overuse of the eyes, not seeing clearly in the distance, habitual squinting, and looking very close, I call it myopia."

"Convex lenses, on the other hand, are helpful for presbyopia in the elderly."

"Of course, the right power is key. Long-term wearing of lenses with inappropriate prescription is also a burden on the eyes, which may lead to vision deterioration; It's similar to overusing your eyes, but it's not as serious as being blind. ”

"And one or even several concave and convex lenses are superimposed, embedded in a cylinder at a certain distance, and they will become telescopes, which can achieve double the distance or even better. You try to do it. ”

Su Jinluan dotted the drawings of the convex lens, and said seriously:

"There are other uses for convex lenses, which magnify what you see, which I call a magnifying glass. The specific effect is simple to explore by myself, but I don't have time to do it. ”

"In addition, if the convex lens is placed in strong light, it may ignite flammable materials such as paper."

"For the same effect, I recommend this triangular pyramid. Ignition from a distance, I think you might be able to use it. Again, experimentation is needed. ”

She clicked on the drawings, her voice low and clear.

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