The telescope that Wang Zheng specially polished was for viewing the moon. The magnification is about 500 times, the exact magnification is unclear, but under good weather conditions, it is still possible to see the general environment on the moon.

After thinking for a while, Wang Zheng said to Li Zhi, "It is much more desolate than I expected. I originally thought that even if there were no towering laurel trees, there should at least be some greenery. But looking at the situation, it is just a barren land, which is more consistent with the dim light of the moon."

Li Zhi took a deep breath and asked Wang Zheng, "Has the steward guessed that this is the situation on the moon?"

"When Chang'e flew to the moon, I also imagined that there would be people on the moon. But then I thought that was not right. If the moon was the same as our earth, then when a large-scale forest fire occurred, our ancestors would definitely have recorded it.

Therefore, I guessed that the moon must be very desolate. In fact, ordinary telescopes can also see some of the situation on the moon, but it is not so clear. I didn't expect that there is not only no one on the moon, but also it is so desolate that there is nothing there. "

Li Zhi took an ordinary telescope and looked at the moon again. He sighed and said, "I have used an ordinary telescope to look at the moon before, and I looked at it very carefully, but I was not as careful as the steward, and I didn't find anything. Now I can see some outlines after comparing them again."

Wang Zhen handed the telescope to Li Xian who was looking anxiously at the side, and frowned and said, "High mountains, huge pits, and a barren land, but it seems that we can't conclude that there is no one up there, right?"

Wang Zheng smiled and said nothing.

Li Zhi explained, "That big pit was obviously caused by a meteorite. Your Yuzhou family has little knowledge of ancient books, so you may not know much about the power of meteorites. According to ancient records, there are also cases of meteorites appearing in various places. Combined with the meteorite craters on the moon, I can be sure that there are no living things on it."

Wang Zhen frowned and asked, "Can't there be a situation like the desert? There are living things in the desert too."

Li Zhi hesitated for a moment and said, "I'm not sure about this. What do you think, Grand Steward?"

Wang Zheng thought for a moment and said, "Let's take a closer look later, but I think there should be nothing on it."

Li Zhi smacked his lips and sighed, "It's a pity that the hot air balloon can't fly too high, otherwise it would be great to go up and take a look."

Wang Zheng raised his eyebrows and asked, "Your Majesty, have you ever ridden a hot air balloon?"

"Hehe." Li Zhi nodded and said with a smile: "I tried it, and it feels pretty good, but it's a bit stuffy when flying high. According to the dojo, it lacks the kind of air that people need. It's similar to the situation on the Tibetan Plateau. The higher you go, the more stuffy you get, until you suffocate to death."

Wang Zheng nodded and didn't ask any more questions. He didn't want to know whether Li Zhi had suffocated a few people to death before giving up.

Li Zhi stopped talking and was thinking about when to get a telescope with a higher magnification so that he could see the moon more clearly.

After Li Xian finished watching, Li Xian watched it, and then Wang Pingan, Xiao Yuehua, and Li Dan continued watching. The little guys agreed that each of them would watch it for a cup of tea. After watching a round, they discussed for a while and then continued watching.

As a result, Xiao Yuehua and Li Dan ran away after watching it once. After the novelty wore off, it became boring.

For a period of time afterwards, only Li Zhi liked to use a telescope to look at the sun, moon and stars from time to time, while no one else looked at them much.

In midsummer, the fleet finally arrived at the mouth of the Yalu River. Xue Rengui personally led the soldiers to greet them. It was natural for Li Zhi to come here to reward the border guards.

"Your Majesty, I, Xue Rengui, pay my respects to His Majesty the Emperor. May His Majesty be well and safe."

"Your Majesty, I pay my respects to you. May your Majesty be well and at peace."

When Li Zhi got off the boat, the soldiers of the three armies all bowed their heads. Looking at the familiar scene before his eyes, Li Zhi was full of energy and spirit. He felt that the exhausted state of mind that had been tortured by Wang Zheng during this period had recovered a lot. He shouted, "All soldiers, stand up."

Then he stepped forward a few steps after getting off the boat and personally helped Xue Rengui up. "My dear Xue, please stand up quickly. You have been guarding Pyongyang for these years. You must have worked hard. Do you need to go back to the court to rest for a while? If you need, just let me know."

Li Zhi looked amiable, but Xue Rengui was complaining in his heart.

He quickly said, "I am willing to serve your majesty loyally and the country. I am willing to guard Pyongyang."

Ever since a group of students from Yuzhou went on a study tour, life has become difficult for all officials in the court, including those in the Central Plains.

Local officials did so because the Tang laws were becoming more and more stringent, and the court did so because Your Majesty was becoming richer and richer, so they naturally did not care about anything when doing things. Given the shrewdness of the emperor and empress, the ministers in the court naturally had a hard time.

Now that Wang Zheng has returned to the court, it is like a mountain has been lifted down on the heads of all officials. It would be strange for Xue Rengui to want to go back. It would be great for him to stay in Pyongyang and live a free life, learning Wu You's secret method, with no shortage of merit or benefits. Only a fool would go back to live his life in humiliation.

Li Zhi laughed and said, "Haha, since Xue Qing's family thinks this place is not bad, then stay for a while. When you want to go back, just let me know."

Xue Rengui is fifty-three years old this year, a time when he is still full of energy and his experience is at its peak. Especially now that all the old ministers in the Lingyan Pavilion have passed away, it is no exaggeration to say that Xue Rengui is the pillar of the Tang Dynasty's military.

After all, there are not many people who can directly defeat the coalition forces of Goguryeo and Baekje. If Wang Zhengheng had not intervened, Xue Rengui could have destroyed these two small countries on his own.

Li Zhi still particularly admired Xue Rengui. Even though the Tang Dynasty was now invincible, this kind of general was the stabilizing force, so naturally he had to try his best to win over the hearts of the people.

Then Xue Rengui bowed and said, "Xue Rengui greets His Royal Highness the Crown Prince, the Chief Steward, and the two Princes."

Li Xian smiled and said, "General Xue, there's no need to be so polite."

Wang Zheng smiled and nodded, "General Xue is polite."

Li Xian and Li Dan returned the greeting, "Meet General Xue."

"It's been a long time since I last saw you, Chief Steward."

Wang Zhen returned the greeting, "General Xue, long time no see."

Since they are of the same level, they should just bow to each other.

Wang Ping'an and Xiao Yuehua also came over and bowed, saying, "General Xue, how are you?"

Xue Rengui returned the greeting, "My dear young master, my dear young lady, how are you."

When we met for the first time, everyone seemed very polite.

Afterwards, Xue Rengui invited Li Zhi into the temporary palace. Li Zhi brought rewards for the soldiers on the ship, and naturally someone went to hand them over.

Here, Xue Rengui began to report to Li Zhi on the changes in Pyongyang in recent years. In fact, these reports were reported to Chang'an every year, but it was another matter to speak about them in person in front of the emperor.