I want to think about it, I want to think about it carefully, come one by one, soap first, how to make soap, Li Yong took out a small book from his shabby robe, this small book is some things he came here to record, the small book also has a paper-wrapped homemade charcoal pen, Li Yong has no brush, even if he has it, he will not use it, Li Yong carefully opened his small book, this small book is the paper binding that he finally got by abduction, the paper, ink, pen and inkstone of the Tang Dynasty are monopolized by the major families, In this era, there is almost no way out for the children of poor families who want to study, and the school in Li Yong's village is also opened by large gentry with money, like Li Yong can go to study because his father spent an acre of land to replace the place, but he was kicked out of the school after a few years of study.

What is soap made of, by the way, I remember, oil is added with potassium hydroxide, potassium hydroxide is formed after the oxidation of calcium carbonate, and calcium carbonate can be made out of lime, yes, that's it, buy materials first to experiment, but what about the money? Or go back and discuss it with your cheap father, Li Yong stood up and walked home in the footsteps of Wang Ba, who did not recognize his six relatives, and pushed away the dilapidated thatched hut that he had lived in for more than a month, his mother Wang was spinning, and Li Yong had an inexplicable kindness to Wang's Li Yong, who may have lost his mother since childhood, and now he has regained this hard-won maternal love, which makes him cherish it very much, Wang is also like a mother all over the world, doting and caring for his children, after Li Yong fell and was injured, Lang Zhong said that when the medicine stone was incurable, Wang cried that heartbroken, and took care of Li Yong after he miraculously came back to life, which made Li Yong feel sorry for this mother, and also regarded Wang as his mother.

"Mother, I'm back."

"The idiot is back, hungry, right? Mother will cook for you. ”

Wang watched his son come back, hurriedly put down the work in his hand, and prepared to cook for him, because his son has a larger amount of food than ordinary people, and the people in the countryside laughed at him that his son was a rice bucket, but Wang didn't mind at all, his son is always the best, Li Yong was moved to tears, but he had a "big event" to discuss with Wang today, Li Yong hurriedly grabbed Wang who was preparing him to cook, asked her to sit down, and said after organizing the language

"Mother, don't worry, I'm not hungry, it's like this, the child wasn't injured and comatose some time ago, at that time the child saw an old Taoist in a daze, he said that the child was not born stupid, but he has not been ignited, and then taught the child some skills, now take some old Taoism to teach the child a little ability to use, what do you think?"

Wang looked at his dumb son in disbelief, wondering if the idiot was not injured yet, why did he talk nonsense again, he couldn't help but become more worried, and hurriedly grabbed Li Yong's hand and asked eagerly.

"Idiot, aren't your injuries healed yet? Do you want your mother to ask Lang Zhong to show you again? ”

Li Yong knew that his mother didn't believe what he said, and he didn't believe it either, after all, it turned out that their son was dead, and he was just another stranger who took their son's body, Li Yong hurriedly stopped his mother and said.

"Mother, I know you may not believe this, but the child didn't lie to you, don't you think the child is any different from before?"

Wang looked at his son who was still stupid, and his appearance had not changed at all, but since he woke up, it was indeed different than before, and he was not as stupid as before, but a little spiritual, to put it bluntly, he was not so stupid, listening to his son say this, Wang felt that he was too worried, so he asked with concern?

"That's good, my mother doesn't care about the old gods and immortals, as long as you are safe, my mother will rest assured."

"Mother, in fact, the child wants to ask the family to get some money and make some soap to make our family's life more comfortable."

Li Yong saw that Wang no longer dragged him to Langzhong to get a needle, and hurriedly told her his thoughts, Wang frowned slightly, his son has never taken money from himself, although the family is not rich, there is still no problem with food and clothing, but what kind of soap is what his son said, I have never heard of it, but I don't want to hit my son, so I have to say patiently.

"Idiot, although my mother doesn't know what the soap you are talking about, but you also know the situation at home, it's not that your mother is unwilling, it's just that the little money your father has worked hard to earn is not easy, and we can't take out too much money.

"Mother, I don't want to go back to school, and the child doesn't have much money, as long as the money is consistent, if he loses, then the child will obediently follow his father as a farmer, do you think it's okay?"

Li Yong heard that Wang still wanted him to go back to that school to study, and hurriedly dissuaded him, and said that he could not succeed in becoming a farmer, and that there was always less money in the early Tang Dynasty, because after Emperor Li Er and the Turks signed the Weishui Alliance, money was even more valuable, Wang looked at his son's resolute attitude, and had to say that he would discuss it when his father came back, after all, money has always been not small money, and their family has not much left in a good year, and if the situation is bad, there is almost no money left.