Xie Yun understood at this time why this ointment could not be promoted, and the issue of shelf life alone was a big problem.

If preservatives are added to it, the medicinal properties of the drug itself will be destroyed.

And Lin Zhiyuan is right, no girl likes things that smell of medicine.

And this is still improved, otherwise it used to be stinky, but I am afraid that it will be more difficult to be accepted.

Xie Yun looked at the box of medicine, took it, and asked Lin Zhiyuan.

"Professor Lin, what's in this?"

After Xie Yun asked, listening to Lin Zhiyuan's voice, Xie Yun raised his head, and then realized that since this is a recipe handed down by the Lin family, it must not be passed on, and he asked a little too much.

"I'm sorry Professor Lin, I didn't mean to...... I know that this kind of thing is not said to the public. ”

"There is nothing hidden, the things that can be passed down are all treasures in the medical field, this recipe was shared by my father a few years ago, but the process of boiling is cumbersome, and it can't be promoted, so few people know about it."

"Then these people are so discerning." This is Xie Yun's sincere words.

"There are sumu, soapthorn, bone penetrating grass, and notoginseng ......." Lin Zhiyuan said several flavors of traditional Chinese medicine, and Xie Yun listened carefully and remembered them one by one.

Xie Yun put away the box of ointment and had to apply it three times a day, so that it would be more effective.

Usually in the morning and evening, Lin Zhiyuan will help her apply it when she is there, Lin Zhiyuan knows the medicinal properties, so he kneades it very well.

At noon, Xie Yun was at school, and when she painted by herself, she always remembered when Lin Zhiyuan helped her paint.

After a few days, Xie Yundu asked Lin Zhiyuan to go back by himself, she said that she had something to do at school, but Lin Zhiyuan didn't feel it at first.

Later, Xie Yun came back later and later, and Lin Zhiyuan noticed that something was wrong, and asked her if she had encountered any difficulties, or if she was embarrassed by someone.

Xie Yun only said that it was okay at first, but Lin Zhiyuan didn't believe it, he didn't leave that day.

I saw Xie Yun go to the school's laboratory, that laboratory was vacant, and the general professor's laboratory was in another area, and the laboratory here was for students.

Lin Zhiyuan didn't know what Xie Yun was doing in the laboratory, so he followed her over to take a look.

She was very serious in her work, and she didn't even notice that Lin Zhiyuan went in, Lin Zhiyuan was watching her from the side.

Only then did she find out that she was studying the bottle of scar removal ointment.

And she took out a lot of things from her bag, bottles and cans.

She took out a little ointment, mixed the contents of the small bottle she had brought, experimented with it under the microscope, and after looking at it, she divided it into categories.

She did the experiments, and she did it for three or four hours, standing completely motionless.

Lin Zhiyuan looked at it and saw something.

She's making preservatives that can be added to ointments!

Xie Yun has a breakthrough today, he has not been able to succeed before, and today he can purify a bacteriostatic plant preservative from perilla!

At the very least, it can delay the shelf life of the ointment for up to half a year, which is already a breakthrough.

Xie Yun let out a long sigh of relief, feeling that his entire back hurt.

She wanted to reach out and knead her back, but as soon as she reached over, she felt a large hand on her back clenching into a fist, helping her to beat gently.

Xie Yun was startled, and turned around to see Lin Zhiyuan.

"Are you tired, you haven't moved for four hours, do your hands hurt?"

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