When Li Er was angry, or even when Li Er felt embarrassed, Yang Heng didn't know that he was causing trouble again, but went to deal with another thing.

What's the matter? It's the name of the medical skills I came here last time, which is about Eucommia udon.

"You three, come here, let's talk about your research experience first." Once again, Yang Heng felt the lack of manpower and had been using these five Taoist priests to study in chemistry, but he had no way to find other people, or should he continue to fool Yuan Tiangang and ask him to find some Taoist priests to come here to help.

What Yang Heng didn't know was that Li Er originally sent someone to ask him to enter the palace to see how to deal with the matter about the Qixi Festival, but when his people came here, they found that Yang Heng had entered the mountain, and Li Er's people were also waiting at the mountain pass. When the people arranged by Li Er arrived, they were blocked outside.

"Do you know, this is the order of Your Majesty. He told me to take the princess back." The visitor said very arrogantly, "Come on, I don't know you. People who always hold chicken feathers as arrows. Or you can take out your Majesty's handwritten letter or an imperial edict, so I will go in and inform you. Otherwise, you should go back here. There is the handwritten edict of Your Majesty here, but this is caused by you. You can go back now. You are not allowed to talk to anyone along the way, and you will not be allowed to talk to yourself. Your Majesty will explain it to you after you go back, otherwise Your Majesty will say that no matter who comes in, you must be killed without mercy."

"I don't believe it. Why did someone come in just now? You didn't ask?" "I'm sorry. There is nothing to tell you. I'll tell you again. If you continue to talk here, I won't care if you are someone around His Majesty."

"You, you, wait for me, I will come back." The person who came ran out in a mess. "Remember, from now on, you will not be allowed to say a word. I will forgive you for the few words just now." "You, ah." He was about to retort when he heard an arrow flying past his ear, "This is a warning to you. If you continue to open your mouth, then you don't know where the next arrow will come out, and it must be your throat."

The word "ah" almost came out of his throat, and then he covered his mouth with his hands. Because he had already felt the murderous aura, it seemed that someone was observing him from the side. If this sound came out, then I really don't know if he would leave alive.

He suddenly remembered that this person was a celebrity around His Majesty, but he had disappeared in recent years. It seemed that he had been hiding here to carry out an important task.

He guessed correctly. This is the person Yang Heng took the initiative to ask Li Er to arrange for the people who were difficult to deal with. Other people, such as ordinary people and some foreign envoys, did not need him to come out to deal with him personally. Yang Heng's people were dealt with. How could he judge these people? Sometimes it was people he knew. Without Yang Heng's leadership, sometimes it was Sun Simiao who came alone. These people didn't need him to take care of them. But for other people, he thought that Yang Heng's people could not deal with him, and some people would come forward without even coming out and solve them directly when they were messing with Yang Heng's people. Most of the time he would still ask. If it was Li Er's people, he would let him go back, and there would naturally be someone following him behind this person. These are all people in the dark. If he gives a signal,

Maybe this person will die halfway, but Li Er gave him the order of death. Except for Yang Heng and Yang Heng's designated person, they are not allowed to enter and exit, otherwise they will be killed without mercy. This is also the reason why Yang Heng is quite at ease with the safety here, and it is also the reason why Li Er's emphasis on Yang Heng is increased, because some of the research and experiments inside will make these people report. If Yang Heng doesn't say it, Li Er will not ask, or even mention it. These things are related to technology. Unless a mysterious thing occurs, Yang Heng will explain it. However, so far, no mysterious thing has happened. Even the lightning rod has not made these people feel that it is a mysterious thing. They don't know that the lightning rod is led down. Otherwise, they will report it, and Li Er will definitely ask Yang Heng.

So this time Yang Heng entered the mountain in a timely manner, which allowed him to escape the disaster.

"What, you mean that the people around me are holding a handwritten there, just not allowing you to go in. If you force yourself in, you will directly kill you." Li Er was also a little puzzled, "Your Majesty, you seem to have sent such a person." There has been no report on anything in the past few years, and Li Er has forgotten about the matter here. After Changsun's reminder, "You go down, remember, don't tell what you saw," "Thank you, your Majesty, that's the slave." Well, this is actually a eunuch, no wonder that the person is still a little taboo about him, "Do you think I should have destroyed him?" Li Er asked behind him again, "Your Majesty, I'll do this." It seems that this eunuch really knows what he shouldn't know, and he's so dead.

"Come down, you see my handling, go back and say hello. If there is such a person in the future, he will destroy him directly. There is no shortage of people around me." Why is this man so bold to monitor Li Er? In fact, this is also Li Er's confidant. When he came, he had already greeted the people around Li Er. He just wanted to see if the people would tell the truth, and dealing with it is naturally Li Er's business. Although they were asked to deal with it directly, they still would not handle it themselves. It would be better for Li Er to deal with it.

"Little Qingfeng is left, Daqingfeng, Damingyue, you two follow me. I have other things to you, and you will be responsible for Xiaoqingfeng." Why are there only three Taoist priests here? It turns out that two of them are studying gunpowder, but they have not appeared in front of Yang Heng for a long time. It seems that they have gained something, so they have been stuck there for research.

"The task of you two is to prepare a lot of soda ash first. What is soda ash? Don't ask me. I don't understand it very well. You have to study it yourself. After you research it and create a large amount of soda ash, you will send me a message. I will assign tasks to you again. Do you know?" "I know the boss, but where should we go to study it?" "Where is this? This is a question. You must know that this soda ash will have a great impact on the land. By the way, there is a stone pit over there, and it will not leak. All the wastewater you caused is put in there. I will arrange for someone to deal with it, or there are other uses."

Because the mountain is a very beautiful environment and there is also an academy, Yang Heng naturally does not want some wastewater to flow out and affect the environment. But if there is a odor in the air, the impact is not very large. In short, the output of these things is very low and easy to deal with. At this time, if you develop some things, you can sell them directly at a high price. Because the things developed by Yang Heng have no substitutes, then selling them at a high price is certain, and the cost of decontamination will naturally be included. When these things are truly mature, Yang Heng can even inspire Li Er or the next generation of emperors to introduce an environmental protection law, so that Yang Heng will not become a sinner. You must know that he is the first person to eat crabs, and he has the final say on how to eat them.
Chapter completed!