I am studying and eating melons in Chronicle

"What? You said you want to improve the artificial valve?"

Yun Yi choked on several sips of tea after hearing her daughter's bold idea, and Xie Yuzhen, who was cutting herbs beside her, turned her head in surprise, but she just asked, "What are you going to do?"

Yunling sat down, took a piece of paper, and said while writing: "There are two main types of artificial valves, one is mechanical and the other is biological. Mechanical valves are mainly made of titanium alloy, stainless steel and other materials... "

"and many more."

Yun Yi interrupted her, dubiously: "I have heard of the two industrial materials you mentioned, and they have been produced in steel factories in Liao Province, but the output is extremely low, and how can you be sure that they can be used in medical treatment? What about technology?"

Yunling can't say that this is something that people in the future experimented with, right?

Now she is undoubtedly taking the answer and compiling the steps to solve the problem.

"Dad, don't interrupt me, just listen to me!"

"All right, all right, you say."

"Another type of bioprosthetic valve mainly uses biological tissues such as bovine pericardium and porcine aorta. This kind of biofilm material is not easy to form thrombus in contact with blood, so I think the scope of use of such devices can be expanded."

In fact, what Yunling has not said is that the biological valve will gradually calcify and decay, which will also lead to dysfunction, requiring another surgical replacement. This is a drawback that cannot be overcome today.

However, it is written in the book provided by the system that with the development of biomedical engineering, degradable polymer scaffolds will appear in the future, which can be replaced.

However, she didn't know exactly how many years it would take to meet the technological standards for manufacturing.

Yun Yi raised a question: "I don't know much about biochemistry, but the biological tissue you mentioned must be embalmed. What are you going to do in this step?"

"Treatment of biological tissue material with glutaraldehyde can prolong its useful life."

Seeing her talking eloquently, Xie Yuzhen couldn't help wondering, "How do you know what you said?"

"... Well, foreign countries have already developed it, and I just want to improve on this basis."

In fact, Yunling is not too sure whether there are finished products produced abroad, but due to policy reasons, the information is blocked and there is no way to verify it specifically, which is a universal excuse.

Yun Yi frowned: "Then how do you know?"

After experiencing the last incident, the Yun family's sensitivity to policies suddenly increased. He hoped that he would not touch foreign things.

"..."

Yunling ran over as soon as she had an idea, and she didn't prepare a countermeasure in advance, so she couldn't express it in words.

Yun Yi didn't know what he had come up with, and turned pale with shock: "Lingling, there are two party members in our family, and they have correct ideas and are resolute in defending the country..."

Yunling immediately stood up, her forehead was speechless: "Dad, what are you talking about, I didn't get the news through the way you thought!"

"Then how do you know this information?"

Yun Ling bit her lip, regretting in her heart, she shouldn't have said this so early.

"Can you just take it as my own idea?"

The eyes of her parents already told her the answer.

--no.

"Dad, Mom, you believe in me, I will not do anything that is not good for the country or the people."

Xie Yuzhen sighed: "Of course we believe in the daughter we grew up with, but today's scientific research projects must go through layers of review. If you can't even answer these questions from us, how will you deal with the many follow-up questions?"

Yunling knew that her mother was right.

She suddenly felt a sense of frustration, that is, the kind of powerlessness that has given the answer to herself in the future, but she can't tell others in the end, because she can't find a suitable reason.

She was sitting on the wooden chair, her mind was empty, and she suddenly had an idea.

"Dad, do you know where Professor Lan is now?"

Yun Yi was surprised: "Why are you asking this?"

Yunling thought for a while, and then shifted her attention cryptically: "Professor Lan is a top expert in the cardiovascular department, and she is very clear about these things."

Yun father and mica looked at each other, could it be that Professor Lan told the child?But they have never met before, when did they meet?

It's not clear why, but the two still have a natural and absolute trust in their children.

"It's in a cowshed in a certain village on the outskirts of the capital. Last time, Professor Wu mentioned that it's from Wengai County. If you want to know, I'll help you to ask carefully. But there is one thing, you are not allowed Go without authorization."

Yun Yi was unusually serious, and Yun Ling knew what he was worried about, but coincidentally, Wengai County seemed to be the address of Uncle Chu Songlan's home.

"Dad, don't worry, I have an educated youth friend, her hometown is Wengai County, I just went to take a look for her."

The scrutiny in Yun Yi's eyes became more and more intense, and the three big characters "Don't go" were prominently written in his eyes.

"Really, my friend's name is Chu Silan, her uncle and aunt's house is over there, I didn't lie to you!"

Of course she wasn't lying, but she also had another purpose. Yun Yi and Xie Yuzhen were not stupid, they could see what she was trying to do.

In the end, it was Xie Yuzhen who made the final decision: "If this is the case, at worst, we will go there together in the next year."

Yun Yi nodded approvingly.

Yun Ling also had no choice but to agree, she could always find a way to sneak in to find Professor Lan, after all, there was such a cheating tool as the system, which could deceive people no matter what.

In fact, she also knows the current situation, and going to Professor Lan is not the best strategy.

However, this move can kill two birds with one stone. It can not only find a suitable reason for his plan, but also have the opportunity to make Professor Lan and others feel better.

After returning to the house.

"System, why is there no shortcut to make the technological level skyrocket?"

Yunling lay limply on the bed, she knew the answer well, but she still asked with illusions.

Lingling zeroed out the long history of different worlds and placed it in front of her, explaining solemnly:

"History is never dominated by one person. Many people will attribute construction achievements to rulers of different dynasties. But in fact, whether it is the man carrying the burden on the roadside or the woman selling goods at the counter, they are more or less true to the times. The orientation has had a relative impact."

"From your point of view of historical materialism, the people are the creators of history."

Yunling's spirit gradually became tired, and she said lightly: "You are right, just like last time I mixed the advanced science and technology of this era into the box, but it still had little effect in the end."

"I was naive at the time, thinking that everything would be fine if I handed over all these things to the top."

"But in fact, whether it is politics or military affairs, there has never been a single word. According to the current national conditions, it is indeed the most important thing for the people to have enough food and warm clothes."

"Only when the people are well-meaning and peaceful are they qualified to talk about spiritual construction and cultural accomplishment. It is the same reason that people know etiquette when they have enough food and clothing, and know honor and disgrace when they have enough food and clothing."

Ling Lingling stared at the ever-increasing sense of social responsibility in the host attribute bar, the core became hot and the earthquake shook, and the end of the antenna flickered uncontrollably.

The sense of social responsibility is directly related to the growth rate of the system upgrade index!
It's... going to be posted! ! !

It wasn't until the progress bar stopped at the 79% mark that the system gradually cooled down.