The system is invincible, but this kitten is very depressed

What is the best thing to sell?

We don’t dare to sell the techniques. Soap, tofu, seasonings, pots, barbecues, drinks, herbal teas, etc. are already available on the market. The cooking methods are also diverse and have their own characteristics, which are even more fancy than later generations.

Due to the strict teaching of master and apprentice, the confidentiality of formula technology and the like is strong. If you don’t check the market, buy and sell casually, and accidentally leak other people’s internal technical formulas, and others will come to you, or even be silenced, then you don’t know where to go. Justice was avenged.

Mainly because they can't be sold for much money.

Doing business? Innovative business model? Or sell some things from later generations, such as perfume, facial masks, baby warmers, preserved eggs...

But I don’t have time, so I won’t mention these for now and will talk about them later.

Zhang Shan thought about it and decided to sell medical books.

"Thousands of Gold Prescriptions", "Huangdi Neijing", "Waitai Secrets", "Compendium of Materia Medica", "Compendium of Materia Medica"...

The "Secrets of Waitai" is a 40-volume book with more than 6,000 prescriptions. The "Compendium of Materia Medica" contains 365 kinds of medicines. The "Compendium of Materia Medica" was written by Li Shizhen in the Ming Dynasty. It has not been heard of in this era. It’s difficult to price, troublesome.

Zhang Shan spent 350 points to purchase the remaining copies of "Secrets of Foreign Affairs" and "Compendium of Materia Medica".

The remaining volumes of "Secrets of the Outer Taiwan" are about ten volumes, containing more than 2,000 prescriptions.

For this reason, Zhang Shan also asked Yang Yanxi for twenty taels of recharge before entering.

Yang Yanxi frowned as she looked at the money in her hand, which had grown from more than one hundred taels to the current twenty-five taels in more than twenty days.

Zhang Shan looked at the remaining 61 points in the system and felt like crying.

Zhang Shan threw two medical books to Yang Yanxi.

He opened the book and read for a while, then asked: "Master, do you want me to study medicine?"

Zhang Shan asked: "Want to learn?"

"Master wants me to learn, so I will learn."

Zhang Shan frowned, looked at Yang Yanxi solemnly, and said sincerely: "Disciple, there is no limit to learning, but life is limited, and there is actually very little we can do."

"As a teacher, I hope you will take the path you like, and the things you learn will be what you want to learn, or must learn."

"Don't change your choice because of someone else, even a few words from your teacher. The only one who can be responsible for your life is yourself!"

Looking at the meditating disciple in front of him, Zhang Shan slowly turned around, put his hands behind his back, and looked up at the roof at a 45-degree angle, already laughing at his chicken soup in his heart.

"I understand, Master!"

"Well, just understand!"

"Tell me what you want to do in the future?"

Yang Yanxi thought for a while and said, "I want to follow Master."

Zhang Shan said in surprise: "What about your biological parents?"

Yang Yanxi lowered her eyes, turned away her face, and said in a heavy voice, "They don't care about me at all."

"If you cared, why did my adoptive parents let me call them dad and mom, and why did they tell me the truth before something happened? In the past ten years, there has not been a letter, and they have never come to see me."

Listening to the complaints in Yang Yanxi's words, Zhang Shan could only say: "Maybe they have their own reasons?"

"Master, if it weren't for you, I would be dead."

Zhang Shan wanted to give some more advice, but when he heard these words, he couldn't say anything.

It made sense at first, at least he was living a good life, but later he became a beggar, so hungry that he could only steal and rob. Four years later, after suffering so much, he still didn't find his biological son. This is a bit unjustifiable.

Zhang Shan is not the Virgin, and it is not easy to make random guesses before knowing the truth clearly.

Precocious children are not worthy of praise. On the contrary, they endure grievances that should not be endured at this age.

Zhang Shan jumped on the table, hugged him tightly, patted his back, and said softly: "Okay, okay, don't think so much until things are clear."

"No matter what, you will always be my master's disciple, and the master will never abandon you."

Yang Yanxi hugged Zhang Shan back and asked, "Then Master won't return to the Demon Realm?"

Zhang Shan paused and said, "Well, I can't go back for the time being. I will come to the human world to survive the tribulation. It can take as short as a few years or as long as decades. It depends on the opportunity."

It's very possible that you won't be able to go back.

"Master, what is the disaster?"

"I don't know, I'm still looking for you."

"Master, if you can't make it through, will you die?"

Zhang Shan lowered his eyes, "I don't know, maybe."

Yang Yanxi's voice was humble, even pleading, "Then, Master, can you not go through the tribulation?"

Zhang Shan blinked, "This is not something I can decide."

"Don't worry, my master will not die so easily. If my master dies, there will be nothing left to see."

"Don't think so much, you can be sure of yourself as a teacher."

"Hurry up and pack up, let me take you to make money!"