Confession you don't agree, why are you angry when I change my mind?

"Junior sister, it's really amazing. This purification speed is more than ten times faster than before." Senior brother Tang Qing's face was filled with surprise.

Another senior brother next to him also looked excited: "Yes, little junior sister, not only is the speed more than ten times faster, but the purity has also been increased by at least two times. The medicinal liquid we used to purify with this instrument had a purity of less than 20%. You still need to use other instruments to extract the purest essence before it can be used. Now you have skipped this stage directly. It is really amazing. Junior sister, please tell me what this is. principle."

"I changed the circuit of the chip and the working process of the instrument, so I got this result. The specific situation is like this..."

Su Yiwan was very patient and analyzed the specific situation to several people.

Everyone listened with great interest. It was much more detailed and easier to understand than the teacher's lecture.

Although they understand the principle, they really can't do it.

After all, not everyone is as perverted as Su Yiwan.

Everyone couldn't help but sigh in their hearts again, their little junior sister was really not a human, but a god.

Such a simple change can have such a terrible effect?

This instrument was bought for 5000 million, and now its value has increased at least ten times!

And it’s really something that even money can’t buy.

"We only have ten units of this instrument in the country. Junior sister, do you want to take them all back and change them? But after we get them back, no one else will be able to use them." Tang Qing said eagerly.

"Let's talk to the teacher and see if there's any way to buy some old obsolete instruments. We don't necessarily need to use such high-end instruments for renovation. We can buy some cheap ones and save some money." Su Yiwan shook her head.

She was so unjust that she spent 5000 million on this piece of junk.

Hundreds of years from now, if this thing is left on the side of the road, no one will pick it up.

That is to say, those people in the Lighthouse Country now think that this technology is so great, but they still hide it and are unwilling to share it.

"Ah?" Several senior brothers and sisters were all shocked.

Collect junk?
"Ah, what, are you stupid? It costs 5000 million to buy this thing. If we want to mass-produce anti-cancer drugs, we need at least twenty such instruments to purify the medicinal materials, or even more. Otherwise, there will be no If we can't keep up with the current demand for anti-cancer drugs, how much will it cost if we all buy them? Of course, we will collect the junk, the discarded ones, and the ones that others don't want. If we buy them back, I can change them. The effect will be the same after all." Su Yiwan gave them a look.

Everyone immediately understood.

Tang Qing ran the fastest and quickly ran to find Qin Lihua.

Because Qin Lihua is old and physically weak recently, he often only comes to the laboratory for a while and then goes back to rest, and today is no exception.

He stayed in the laboratory for an hour. Seeing that Su Yiwan's work was going well and everyone was cooperating, he went back to rest.

The 90-year-old man's health is getting worse day by day, and it is even difficult for him to persist in completing an experiment by himself.

When Tang Qing came over, Qin Lihua was sitting in the living room and taking a nap. He was woken up by Tang Qing's snoring. His heart palpitated for a while, and finally he couldn't help chasing Tang Qing with a feather duster and beating him.

"Teacher, why are you beating me? I came to you for something important." Tang Qing felt aggrieved and received a beating inexplicably.

"What's the matter? Tell me." Qin Lihua breathed for a while.

Tang Qing saw that something was not right about his expression, and quickly helped him sit down on the sofa, and then poured a glass of warm water for Qin Lihua: "Teacher, have you had any health problems recently? Why don't you let me give you some warm water?" Take a look."

"What problem can I have? I'm almost 90 years old. I'm getting older and my health is getting worse every day. It's not a big problem. Why are you bothering your junior sister? She takes you guys like trash every day. It's already hard enough to trouble her." Qin Lihua drank some water, regained his breath, and glared at Tang Qing angrily.

Tang Qing felt a little aggrieved, "Teacher, we are already excellent, it's just that the junior sister is even better."

"Okay, let's stop talking nonsense. What's the matter with you? If you're not studying with your junior sister in the laboratory, why are you here?" Qin Lihua asked impatiently, too lazy to tell him.

"Oh, it's the decomposer I bought from the Lighthouse Country before. My junior sister asked you to see if you can find a channel to buy a batch of discarded, second-hand, cheaper junk goods. She said she is useful, the more The better, the lower the price, the better, it doesn’t matter even if it’s been scrapped and can’t be used, just collect a batch for her like you collect rags.” Tang Qing quickly got down to business.

Qin Lihua was stunned when he heard this: "What is your junior sister doing collecting junk things? Is it because the family has no money and can't afford her to buy new ones? How can you wrong your child?"

"No, no, that's not the case. Teacher, my junior sister said, that thing costs more than 5000 million. Spending 5000 million to buy it is a big mistake. It's too wasteful. If you buy something cheap, she can make it better for you. 5000 million yuan is coming, so let us save some money and not let those ghost guys in the Lighthouse Country make money from us." Tang Qing shook his head quickly and said what Su Yiwan said.

Qin Lihua didn't expect to be able to play like this, but he soon became happy: "Hahaha, okay, okay, these rubbish and rubbish must exist, not only in the lighthouse country, but also in other countries, I will contact the person right away Go, hahaha, my students are really awesome."

He glanced at Tang Qing and said, "Of course, your junior sister is the only one who is awesome. You guys are, well, rubbish."

After saying that, he clasped his hands behind his back and walked out the door with a happy face.

Tang Qing: "..."

It's inexplicably trash.

Forget it, garbage is garbage.Compared with Su Yiwan, they seemed to be quite rubbish.

But as long as things are done, if you are scolded, scold them. It is a fact that their brains are no better than Su Yiwan. It is normal to be disliked by Qin Lihua.

Thinking about the way Qin Lihua was panting after just a few steps after him, Tang Qing still thought that Qin Lihua might have some physical problem, so he hurried back to the laboratory.

"Little junior sister, the teacher seems to be sick." As soon as he entered the laboratory, Tang Qing shouted.

Su Yiwan was debugging the newly modified instrument. His expression changed when he heard this. After quickly stuffing the things in, he handed it over to someone else to take over: "What's going on? What's wrong with you?"

"I don't know, that's it. When I went to find him..." Tang Qing told the story in detail.

Su Yiwan frowned, then turned around and told everyone: "You guys first watch the video for a while to learn. I'll be back as soon as I go."

"Junior sister, it's okay. You can go ahead. We'll watch from here. There won't be any problem." Everyone waved to Su Yiwan.

Su Yiwan left quickly.

"Tang Qing, what's going on? Is there really something wrong with the teacher?" Zhang Qingqing came over at this moment, unable to help but look worried.

These people have been students of Qin Lihua for many years. They have been with Qin Lihua since college. Qin Lihua is very good to them, and they respect Qin Lihua like a father.

"Maybe it's because you are older. Do any of you still remember how old the teacher is this year?" Tang Qing sighed softly.

"It should be 86." I don't know who said it.

Everyone fell silent for a moment.

At 86, he is indeed no longer young. Qin Lihua should have retired and enjoyed his old age long ago.

Unfortunately, none of the students he taught were up to par, and no one could take his place, so he has been holding on to his position until now, almost 20 years later.Everyone looked at each other and sighed.

Su Yiwan came out of the laboratory and hurriedly took a taxi to Qin Lihua's house.

However, Qin Lihua was not at home at the moment, so Su Yiwan felt a little uneasy, but she quickly calmed down.

"System, will the life-prolonging medicine be effective if given to him?" Su Yiwan called to the system in her heart.

The last time she drew a lottery in Pakistan, she drew a lot of life-prolonging elixirs.

The lowest level is one that can increase life span by three years after taking it. Each person can only take it once, and the second time it is taken it will be ineffective.

After that, it will increase your life span by five years after taking it, and each person can only take it once.

In addition, after taking it, your life span will be increased by ten years.

The longest is to increase your life span by ten years.

But Su Yiwan wasn't sure whether eating it would really increase her lifespan that much, and she wasn't sure whether she could give it to Qin Lihua and the others.

"Of course it is useful. Even if you are already a hundred years old and you are about to die, as long as you take it, you will come back to life immediately and extend your life by ten years. But the host should try to use this medicine as little as possible, as it can easily cause big trouble." The system said arrogantly. After answering Su Yiwan's question, he became a little worried.

Who doesn't want to live a long life?
If it was discovered that Su Yiwan had a life-extending medicine in her hands, which could add ten years to her life without any side effects, I am afraid many people would be interested in her.

Su Yiwan nodded, knowing what he was talking about.

She is not stupid, how could she take out these medicines?

At most, it is used by a few people with good relationships around you.

She didn't even give Mrs. Su those things, but Qin Lihua was different after all.

Su Yiwan waited for two hours at Qin Lihua's house before he came back.

Qin Lihua's face didn't look too good, and he was obviously tired. When he saw Su Yiwan, his face was full of joy, and he reached out to pull her: "Wanwan, why are you here? You don't know why you are here?" Make a phone call, why are you standing outside alone? It's so cold, what should you do if you get frozen? Come on, come on, come in, let's turn on the heater for a while."

"Why didn't you tell me that you weren't feeling well?" Su Yiwan took the opportunity to grab Qin Lihua's wrist and took his pulse. Then she looked stunned and frowned.

Qin Lihua still looked like he was smiling: "I'm just old, what problems can I have? I have to have a physical examination every year. If there are problems, they will be detected early. Don't make a fuss. The body will definitely change as people get older. Every day is not as good as one day.”

"How old are you?" Su Yiwan replied dully and followed Qin Lihua through the door.

Qin Lihua's home was very simple. He didn't go back to Qin's house to live with his family, so he bought a house near the school. It was not big, with two bedrooms. Apart from various books and materials, there was basically nothing else in the house. .

After pulling Su Yiwan to sit down, Qin Lihua was busy boiling water for her to make tea.

"This tea is a good thing. I didn't even let Lao Tian drink it when he came. Try it quickly and see if it's good tea. If you like it, I'll give you some later." Qin Lihua looked like he was offering a treasure.

Su Yiwan took a sip and it tasted really good.

She actually doesn't like drinking tea very much, but this tea is fragrant and golden in color, as if it is liquid gold, which shows that it is indeed the best tea.

It is slightly bitter in the mouth, and after a while, the aftertaste is endless, and the mouth is full of aroma and sweetness.

Su Yiwan drank a small cup and was a little surprised.

Qin Lihua poured her another cup with a smile: "This tea is missing. It's only one or two kilograms a year. I got it with great difficulty. It's only two taels. I usually can't bear to drink it. What are you doing today? I’m blessed and I’m in a good mood.”

"Teacher, have you ever drank golden bud?" Su Yiwan nodded, thought for a while, and asked Qin Lihua again.

Qin Lihua's expression froze, and he silently poured himself a cup of tea: "There is no chance to drink that. Huang Jinya's tea is too precious. Each tea plant only picks a handful of tea leaves at the tip. After a year, If I don’t have two taels, how can I get my turn to drink? I can’t even grab it.”

"I have it there. If the teacher likes it, I can send it to you another day." Su Yiwan was not surprised that the tea was so precious.

But she does have quite a few.

Thanks to the system, you can draw everything in the lottery here, including all kinds of extinct collections, calligraphy and paintings, calligraphy treasures, precious teas, and fine wines. She drew a thousand draws in one breath this time. It was really a draw. Bo is fat and has a lot of good things in his hands.

She had ten cans of golden buds, and one small can was one pound. However, she couldn't give Qin Lihua one pound directly, otherwise the old man would be anxious to death and suspected that she had stolen the treasury.

"You, you have golden buds?" Qin Lihua's jaw dropped.

Only one person can drink the golden bud every year. It’s just a little bit a year. The tea tree is hundreds of years old and cannot be cultivated at all. Otherwise, new tea trees would have been cultivated long ago, so It only lasts a year, and others can only drink a little tea leaves cut from other parts of the tea tree, but even so, it is already a great privilege.

What happened to Su Yiwan?
When did Su Yiwan see that person?The one who even gave her golden buds?

Qin Lihua's heart was already filled with turmoil.

Su Yiwan did not explain, but silently took out a porcelain bottle and handed it to Qin Lihua: "Teacher, this medicine is for you, take it."

"What is it?" Qin Lihua had not yet recovered from the shock of Golden Bud. He looked at the white blue and white porcelain bottle with some doubts in his heart.

"It's nothing. It's not a very valuable pill. It's a tonic. Aren't you always feeling tired and low on energy recently? This is to replenish qi and blood. It's not valuable. You should take it. You will feel better after taking it." Yiwan pushed in front of him again.

Naturally, Qin Lihua didn't doubt Su Yiwan's words. He took it directly and poured it out, only to find that it was a pill the size of a longan. It was golden and exuded a burst of medicinal fragrance. Smell it, it made people feel refreshed.

Qin Lihua stuffed it directly into his mouth, chewed it and swallowed it, and then drank another cup of tea before his face was full of satisfaction.

"It tastes really good. I really feel a lot more energetic. Hahaha, Wanwan, you are really a good student of the teacher. When you have good things, you always think of the teacher." Qin Lihua's face was full of smiles, which was originally a little bright. His pale face was now much rosier.

The corners of Su Yiwan's lips curled up: "As long as the teacher likes it, if there's nothing else to do, I'll go back to the lab to get busy."

"Okay, okay, go ahead. By the way, what kind of blood-tonifying medicine are you giving me? I'll introduce it to others later and let them buy it." Qin Lihua asked casually with a smile on his face.

Su Yiwan blinked, with a pure and harmless look on her face: "Teacher, this medicine is not available outside. I prepared it myself. It's called Life-Extension Pill."

"Yan, longevity pill?" Qin Lihua's smile froze, "What kind of pill?"

Su Yiwan's smile became brighter and brighter: "Teacher, you have taken medicine that can increase your life span by ten years, but the quantity is not large. You must keep it a secret from me and not tell anyone."

With a thud, Qin Lihua fell directly to the ground, staring at Su Yiwan with wide eyes. A moment later, his wailing voice sounded: "Ouch - why are you giving me such valuable medicine?" You loser!" (End of Chapter)