After the two finished eating, they went directly to the palace, and they did not take a carriage, but Chu Yuchen took Song Yunshu with light skills.

"Yun Shu, it's here, Qing Han is in the Celestial Elephant Palace now, you go in first, I'll bring the fog."

Chu Yuchen did not carry the mist with him, but put it in a place in the palace, because he knew that the so-called most dangerous place was the safest, although the palace was crowded with people, but it was also the best place to keep secrets.

And no one knows the news of their return, but it is not ruled out that some deliberate inquiries are made.

"Okay, then I'll go in first, I'll explain the specific situation to the National Teacher first, and I'll check him directly after I go."

Song Yunshu nodded, and after watching Chu Yuchen leave, he didn't ask him where the mist was, but walked into the palace of the national teacher.

As soon as he took a few steps forward, Song Yunshu noticed that there was a fairy-like man standing at the door waiting for him, and when he looked closer, he found that it was Qing Han.

Every time he saw him, Song Yunshu had a feeling of seeing a fairy, and Qing Han also had this capital.

"Lord Song, where is the prince? Why are you alone? Qing Han looked at Song Yunshu, there were no other magazines in his eyes, even if he was smiling, but he didn't go deep into his eyes.

Song Yunshu was used to his appearance and didn't take it to heart, but what puzzled her was that they didn't tell Qing Han when they came.

Why did he know that the two were coming? It was also very strange to ask her why Chu Yuchen was not together?

"Master Guoshi, how did you know that the prince and I were coming to you, he went to get something important, let me tell you about the situation of this visit first."

Even if Song Yunshu herself crossed over, she was very puzzled in her heart, is Qing Han really like the people say, Bo Gu Tong Jin, omnipresent?

"Have you forgotten what I do? If I want to know something it's easy, okay, come in, I'm just waiting for you two. ”

Qing Han didn't care about Song Yunshu's unreasonableness, but turned around and walked towards his courtyard, and Song Yunshu hurriedly followed.

She thought about it, and finally apologized: "I'm sorry, Master Guoshi, I just talked too much..."

"Lord Song, you don't have to apologize to me, and you haven't done anything wrong, although the people respect me, but there are not many who really understand me, and you are one of them."

Qing Han didn't take it to heart, but instead comforted Song Yunshu in turn, and the two soon came to the courtyard he said, and in the middle was the astronomical telescope that Song Yunshu gave him.

"Did you find it with this?" At first, Song Yunshu didn't know that ordinary people could also observe celestial phenomena, but the national teacher was really not an ordinary person.

He was able to use this simple astronomical telescope of his own design to observe what the weather was like, which was already amazing.

And there are some things that can't be explained by science, or what the eye sees.

"Let's be honest, the purpose of your coming to me this time, although I have already guessed a little, I still don't understand very well." Qing Han dodged Song Yunshu's question.

"Ahem." Song Yunshu was embarrassed for a while, but he didn't ask any further, after all, this is a skill for people to eat, if he was asked by himself, then how could he get mixed up?

"Here's the thing, this is a very strange thing we encountered when we went to the border pass, there is fog floating on the water, and it is still coming from the direction of the enemy country..."

Song Yunshu picked the most important one and told Qing Han that he actually knew that the two of them would come to him, and he should have generally known it, and he didn't need her to be very careful.

As soon as Song Yunshu finished his introduction, Chu Yuchen also came back with the mist, and at this time, only half of the black gas was left in the container.

When Qing Han saw this black mist, his eyes instantly widened, and he said incredulously: "How could this thing be here, it shouldn't appear here, what the hell is going on?" ”

Although he had already known the cause and effect of the incident from Song Yunshu's words just now, and he was also shocked in his heart, he still couldn't control himself when he really saw the existence of the fog.

This is the first time Song Yunshu has seen Qing Han lose his temper like this, is the fog really serious? "Master Guoshi?"

Qing Han didn't let Song Yunshu continue, but raised his hand to stop her behavior and took the container from Chu Yuchen's hand.

He carefully observed the black gas in the container, this is what Song Yunshu said, floating on the water surface, it was still white in the air, why did it turn black in the container?

Must he have overlooked something?

Chu Yuchen looked at Song Yunshu suspiciously, and asked her with his eyes, Qing Han, what's wrong? But even Song Yunshu himself didn't know how to answer him.

She shook her head, bypassed the national teacher, walked to Chu Yuchen's side, and whispered: "I don't know what's going on, when I told the national teacher about this just now, he was also a little confused. ”

The most important thing now is to wait quietly, and after Qing Han finishes observing, he will naturally solve his doubts.

After waiting for half an hour, the two of them kept their original movements, and Qing Han had also been observing the container, looking at different directions inside and outside for a long time.

Finally, he finally breathed a sigh of relief: "This black gas is what you call the poisonous mist, in fact, it is useless, it only produces poisonous gas in a fixed position!" ”

"When Lord Song put it in a container, its poisonous gas naturally disappeared, and I can't explain what this phenomenon is, but it is certain that there will be no danger!"

When Song Yunshu told him about these situations, he also told him that the border of the enemy country had been swallowed up and no grass was growing.

At first, Qing Han was also like a great enemy, but after he read it, he realized that he was wrong.

"Qing Han, what the hell is going on, don't sell it, just don't say it!" It was enough for Chu Yuchen to wonder for so long, he looked at Qing Han intently.

"Lord Wang, can't you wait for this? I don't really know much. Qing Han put the container on the table and wanted to open the lid, but seeing that the two of them still didn't believe that the fog was fine, they still stopped.

Song Yunshu breathed a sigh of relief when he watched him put down the lid of the container, if it was really opened, if Qing Han made any mistakes, then the three of them didn't know what they would face.

"You'd better explain it to us first!" Chu Yuchen noticed Song Yunshu's mood and nodded at her.

Qing Han is still trustworthy, but he just needs to give the two of them a reassurance.

"Okay, I can't say a word or two, I'd better show you two something, please come with me." Qing Han took the two of them to his study, where he was the only one who could enter, and now he was ready to make an exception.

"This..."Song Yunshu hesitated at the door for a moment.