On April 16, 1929, Qin Di came to the Institute of Medicine to learn about the progress of antibiotic research.

He finally got the good news: after several years of unremitting efforts by more than a dozen researchers, they have continuously screened bacteria from the soil, and have found three strains of Streptomyces, which have a strong inhibitory effect on Mycobacterium tuberculosis! The data of experimental research is three feet thick, and several high-quality papers can be published, but the yield of streptomycin is still too low to be used in clinical practice.

So Qin Di was in high spirits and took matters into his own hands and irradiated the strain with ultraviolet light.

However, when he went into battle in person, he made an even more astonishing discovery: ultraviolet rays actually contained "purple qi" similar to sunlight, which could improve his skills!

Qin Di was surprised and delighted: "Oh my God, I didn't expect such a good thing! I knew that this was the case, so I would soak in the laboratory every day, and I didn't need to wander outside, looking for aura all over the world!"

There are many kinds of aura, and purple qi is just one of them, which is suitable for those who practice pure yang fire exercises.

Qin Di possessed the Five Elements Spiritual Root of Gold, Wood, Water, Fire, and Earth, so he could absorb purple qi and quickly improve his strength.

And Yan Xue is the water and wood spirit root, which can only absorb the moonlight and cannot be exposed to ultraviolet rays.

Ordinary people should not be exposed to ultraviolet light because it can change the structure of DNA, thereby inducing cancer.

Next, Qin Di asked people to buy a batch of ultraviolet lamps and prepared to "light bathe" for themselves.

He stayed in the institute for more than two months, continuously screening Streptomyces, and finally found a high-yielding strain, which increased the production of streptomycin dozens of times.

Subsequently, he sorted out the experimental data with his mother Zhu Wan and sister Qin Ling, wrote a paper, and did a good job of applying for a patent. At the same time, he also gave bonuses to the participants in the research, ranging from 3,000 yuan to tens of thousands of yuan, depending on the degree of intervention in the research.

In those days, one yuan was a piece of ocean, and 10,000 yuan of ocean was still very considerable! A spacious Shikumen house was sold for 50,000 yuan.

The researchers hired by the Qin family are not the top professors in the university. The professors are too active to be constrained. The Qin family invited second-line personnel, who worked step by step in the research institute, not only could get a high salary, but also a lot of bonuses, if they went out, it would be difficult to get half of the salary.

However, before they entered the institute, they had already signed an agreement: if it was the result of some side branch research, it would not directly produce patents, and with the consent of the Qin family, they would be allowed to publish papers. And for major breakthroughs like penicillin and streptomycin, all patents and reputations will be taken by the Qin family.

Carefully speaking, this is also very normal, even in the 21st century, it is not much better, because the Qin family not only invests a lot of money and pays everyone's salary, but also from the overall idea to the general experimental procedures, it comes from Qin Di's design and command. For example, when looking for Streptomyces, at the beginning, those experimenters couldn't help frowning when they heard that strains were to be screened from the soil: the soil is so dirty and complex, what can be sifted out?

But when the experiment progressed day by day, thousands of strains were found in the soil, and little by little they were screened and eliminated, and finally a few strains were selected, which had an inhibitory effect on certain bacteria, all the researchers were stunned!

They don't know who did the experimental design, and they attribute all this to Zhu Wan, and they are committed to Zhu Wan's admiration!

"She is a top scientist and a three-time Nobel Prize winner! Her smart brain is different from others!"

In fact, the strains screened in the past few years are not only one of Streptomyces, but also some other strains, and it is possible to give birth to oxytetracycline and chlortetracycline, but the institute has devoted its main energy to the research of streptomycin, so after several years of hard work, a major breakthrough has finally been made.

On July 1, 1929, Zhang Naijing and Qin Ling came to Qinfu with their daughter.

The little girl Zhang Yiran is almost three years old and has a lively personality, which is somewhat similar to Qin Ling when she was a child.

She opened her dark eyes, climbed onto Yan Xue's knees, and stared at Yan Xue: "Little aunt, you are so good-looking, more beautiful than my mother." ”

Yan Xue smiled sweetly and stretched out her hands to protect her: "Good boy, don't say that, your mother will be unhappy." ”

Qin Ling smiled: "What am I unhappy about? Yan Xue, you are already eighteen years old, right?"

Yan Xue said: "Yes, time flies so fast. ”

Qin Ling said: "The family doesn't talk to the two families, but I take you as my brother-in-law! When do you want to marry in?"

Yan Xue blushed: "Sister, what are you talking about!

Qin Ling glanced at Qin Di and said, "My brother is a talent, kind-hearted, sincere, good anywhere, but when he is old, he always refuses to get married." There are people out there who have broken their mouths and say things that are hard to hear. I'm my sister, and I'm very anxious for him. ”

Yan Xue bowed her head and remained silent, she was willing to do a lot in her heart, but as long as Qin Di didn't open her mouth for a day, she would be a maid and an apprentice, and she didn't dare to marry each other.

Qin Yue was also beside her to help: "The male should get married, and the female should marry, what's so embarrassing? Do you say, Yan Xue?"

Yan Xue still bowed her head and was silent, and after a long time, she said in a low voice: "I am a girl who was bought, and I have been a member of the Qin family all my life, it is my blessing that Mr. is willing to marry, and it is also my life if I don't want to marry......"

Hearing this, Qin Yue felt a little sad: "You girl, how can you think like this? It seems that the Qin family is sorry for you." ”

Qin Ling raised his eyebrows and said, "Yan Xue, don't worry, my mother and I will make decisions for you! Qin Di is thirty years old, and he can't drag it down! Otherwise, do you want the reputation of the Qin family?"

In the study on the other side, Qin Di was playing chess with Zhang Naijing, and couldn't help but smile bitterly when he heard this.

It stands to reason that he is the reincarnation of an immortal, so what does it matter if he gets married or not? Even if he is alone for the rest of his life, he can be happy. He originally took Yan Xue as an apprentice, but in the eyes of his family, he was a child daughter-in-law, and even Yan Xue thought so!

But to think about it another way, the immortal is unrestrained, what he wants to do, even if he marries Yan Xue, so what?

This is a secular world lacking in aura, and it is not the Condor Heroes in the novel, how can there be any generational barrier? Isn't it normal for men to love women?

Besides, even in the spiritual realm and the immortal realm, there are many things for masters to marry apprentices, as long as both parties are willing to do so, God will not punish them.

Zhang Naijing raised his head and said with a smile: "Brother, you really have a vision! As early as eleven years ago, you brought this girl back from outside! I remember that at the beginning, she had a thin yellow face, thin hair, and a face so small that it could be covered with a slap......

Now that the eighteenth year of the women's college has changed, it has become difficult for people to look at it directly.

Moreover, she is smart and smart, fluent in English, French and Japanese, and is still studying in the Business School of Fudan University......

What's more, she is also the mysterious song fairy 'Xue Xiangwan', if the news spreads, there will be many people around the gate of the Qin Mansion looking for her to sign autographs! Maybe there are still people who want to duel with you!"

Qin Di just smiled slightly and didn't say anything.

In fact, Zhang Naijing is not wrong, with the repeated broadcast of the radio and the gradual popularization of the gramophone, the three albums are in full swing, "Snow to the Night" is praised as a song fairy, everyone will sing her songs, if it is put aside to future generations, she is a hundred times more popular than the most famous singer, a thousand times!

The same gramophone, the same record of EMI, the singing voice of "Snow to the Night" has a special magic, many times better than other singers. No matter who it is, they can't imitate her fairy rhyme, and it's good to have two points of similarity.

In these years, although there are no paparazzi in later generations, there is no shortage of curious spies, digging out their minds to find the origin of "Snow Late". Someone has already contacted Yan Xue from the Qin Mansion, but Yan Xue never sings in front of people, so this matter has never been confirmed.