Cui Yingying was playing with the glass beads. When she saw Li Yan coming back, she walked to Li Yan with the glass beads and said, "Your Highness, look at this glass bead, this glass bead was given to Binglan by Qin Huaiyu. I have never seen such a beautiful glass bead before."

Zheng Binglan's face turned redder when she heard Cui Yingying mention this.

Li Yan looked at the glass bead with awkwardness. No matter how stupid Qin Huaiyu was, he would not say that the glass bead was given to him by Li Yan. Therefore, Cui Yingying didn't know that it was Li Yan's thing, and she was still very envious. It has to be said that the glass beads are very valuable in the Tang Dynasty. They are usually given by the royal family, and some were shipped from Persia, which are also of great value. Therefore, in order to show their identities, or compare with each other, they will buy some glass objects at home. Moreover, there were many impurities in glass at this time, and it was not as crystal clear as modern glass products.

The Zheng sisters and Cui Yingying are both from famous families and have seen these things, so they know the value of these glass beads. Because of this, the three of them were so surprised when Qin Huaiyu gave this glass bead to Zheng Binglan.

"It's really beautiful!" Li Yan echoed. He couldn't interject it in person. This thing he gave to Qin Huaiyu. In modern times, this thing is still a few ten yuan, and it's not as valuable as a potato.

Li Yan came back. In order to avoid suspicion, the Zheng sisters did not stay here anymore, so they took the initiative to leave the Nanyuan. When Cui Yingying saw that the Zheng sisters were about to leave, she exchanged the Glazing Pearl for Zheng Binglan. She still stared at the Glazing Pearl, and was very envious, "This Glazing Pearl is expensive, how could Qin Huaiyu have free money to buy this?"

After the two left, Cui Yingying expressed her doubts. She knew Qin Huaiyu's salary very clearly, only 100 guan a month, and now she has saved up about 1,000 guan a maximum of 1,000 guan a month.

Li Yan shook his head helplessly and put the cloth bag in Cui Yingying's hand, "Look at it for yourself!"

Cui Yingying held the cloth bag and felt that the bag was heavy. When it swayed, it made a crisp "dial" sound. He followed Li Yan back to the room, placed the bag on the table, and lifted the cloth bag layer by layer.

"Oh my God!" Cui Yingying grew up with her mouth in surprise when she saw the things inside, and then she reacted, "Your Highness, you spend money on selling so many jewelry. What a waste!"

Li Yan sat down, poured himself a glass of water, and said, "These things are valuable in the Tang Dynasty, but they are not valuable in Luo'anguo. The things you see are not worth even the usual money." Li Yan did not intend to tell Cui Yingying that these are fakes. Since they are beautiful lies, why bother exposing them? Otherwise, wouldn't it be too boring?

Upon hearing this, Cui Yingying was stunned, "These gems are only worth a regular amount?" She took a ruby ​​and looked at them carefully, incredible.

"That's right, Qin Huaiyu's glass bead is the same. It's just an ordinary toy in Luo'anguo." Li Yan took a sip of tea and continued.

After confirming that this was true, Cui Yingying's expression began to change. She suddenly hugged all the gems in her arms and laughed: "These are mine, all of them are mine. No one can compete with me."

Li Yan was speechless. It seemed that women in any dynasty had a natural preference for gems...

The next day, Wang Gui escorted Murong and his son and Li Yan to Chang'an as agreed on the armor given to Li Shimin. Before leaving, he came to Li Yan's mansion to say goodbye to Li Yan, and Li Yan finally completed the task assigned by Li Shimin.

After Wang Gui left, Yizhou began a new round of commercial promotion. Now Tong Nian is gradually familiar with the procedures for promoting new products, advertising, on-site trials, white sugar and cooking oil, these two things are not required by Li Yan to explain. The Shengtang Business Daily has been published, and the chef's training is also in progress. However, the Shengtang Chamber of Commerce itself is a brand, and the release of new products will immediately attract a large number of merchants. After the Yizhou Business Daily was issued, merchants flocked to the Shengtang Chamber of Commerce to ask about the information about these two products. Tong Nian did not immediately pay attention to these merchants, but pretended to be mysterious, waiting to create a greater publicity effect.

Tong Nian was busy here at the Shengtang Chamber of Commerce, and Li Yan did not interfere in product promotion. Tong Yu brought good news to Li Yan at this time. The artillery was officially tested and was waiting for Li Yan to check.

That morning, Li Yan, who received the news, was in a good mood. He notified Qin Huaiyu and Zhu Youzhi, and the three of them went to watch the first batch of artillery together.

In the valley two miles outside the Taoyuan Valley, Tong Yu was setting up targets with more than a dozen craftsmen. Taoyuan was too small and there were military camps and workshops inside. The range of the cannon was too far and powerful, so it was not suitable to conduct artillery tests in Taoyuan. So during the development of the cannon, Tong Yu kept taking people to test the power and range of the cannons in a newly opened test field outside the valley. After reaching his satisfaction, and according to the current technology, he could not improve it, he told Li Yan about the successful development of the cannon, because he thought that he would show it to Li Yan, and that he would show the best.

On both sides of the small valley are bare mountains, with only sparse trees on the mountain. The scenery on the mountain is full of views. There is a five-mile-wide land in the middle of the mountain. It is a very suitable place for artillery test firing. When Tong Yu came here, he decided to stay here.

Li Yan brought Qin Huaiyu and Zhu Youzhi to the artillery test site. This was the first time Zhu Youzhi came here. He didn't expect that Li Yan had such a secret base, but he was quite pleased, at least this showed that he had integrated into Li Yan's circle.

"Your Highness!" Seeing that Li Yan was coming, Tong Yu greeted Li Yan and greeted Qin Huaiyu and Zhu Youzhi.

Li Yan was all on the cannon, so he said, "Take me there and have a look!"

"Your Highness, please come here!" Tong Yu reached out to lead the way and led the three of them around a corner. The three of them saw three dark long-tube objects located in the middle of the flat ground. This was undoubtedly a cannon.

Compared to Li Yan, Qin Huaiyu and Zhu Youzhi were more interested in these cannons, and they took the lead and looked around the cannons.

Speaking of artillery, Tong Yu actually developed it very early, but he was not satisfied with the pre-installed artillery of the 16th century. Because he saw more excellent artillery from the technical information provided by Li Yan, he continued to improve it. Until now, due to the limitations of other auxiliary technologies in Taoyuan, he stopped developing it, and these artillery were more in line with his requirements.

The three cannons that Tong Nian placed in the test site have different shapes. The barrel on the left is very long, the barrel is three meters long and has a diameter of 130mm. The pipe wall gradually becomes thicker from top to bottom. However, the wall of the red-clothed cannon in the 16th century was at least half thinner, greatly reducing the weight of the cannon. This is all because of Taoyuan's steel refining technology, the introduction of Li Yan technology, and video teaching, the steel smelting skills have reached a new level.

"Why is the barrel of this cannon so long?" Qin Huaiyu asked after looking for a while.

Tong Nian explained at this time: "This long-barrel cannon is called a naval cannon. As the name suggests, it is loaded on a warship. Because the barrel is long, the range of this cannon is also the longest."

Qin Huaiyu nodded thoughtfully when he remembered the big ship being built.

Zhu Youzhi occasionally saw the style of artillery in some modern books. He pointed to the smallest artillery on the right and said, "If I'm not mistaken, this is a field artillery, right?"

"That's right, this is indeed a field cannon." Tong Yu was a little surprised. Unexpectedly, Zhu Youzhi knew it out in his eyes. He didn't know that the Military Academy had also opened video teaching.

The cannon that Zhu Youzhi pointed to was placed on a two-wheeled car. The cannon was fixed on the bracket on the car, and a pull rod for traction extended from behind. The length of the cannon was half less than that of the naval cannon, only about one meter five, and the caliber was 105 mm.

There was still a cannon left, Tong Yu explained: "This is a siege cannon, which can also be used to defend the city. It has a large caliber, a lot of ammunition loaded, and it has great power."

While the few people were talking, the craftsmen who set the target returned. The target they set on the mountain had been set up and were just waiting for the experiment.

"Your Highness, are you testing the shot now?" Tong Yu asked.

Li Yan was very interested in the cannons developed by Tong Yu. He had just observed carefully that these cannons were actually rear-mounted cannons, "Let's start!"

Li Yan stood on one side with the two, waiting for the cannon shooting test. Tong Yu received an order to ask the craftsmen to start adjusting the angle of the cannon.

The craftsman skillfully fiddled with the naval cannon, obviously practicing frequently. After a while, the two men adjusted the angle of the cannon. The third one opened the wooden box next to him and took out a cylindrical shell from it. The craftsman next to him opened the base of the cannon, and the craftsman holding the cannon shell was stuffed in.

"Your Highness, please cover your ears!" Tong Yu reminded.

Li Yan covered his ears as he was, and Qin Huaiyu and Zhu Youzhi also followed suit and covered their ears. When Tong Yu saw that the three of them were as they said, he shouted: "Let me go!"

The craftsman obeyed the order, grabbed a rope from the cannon and pulled it violently. Li Yan heard a "boom" sound, and then the ground under his feet trembled. He looked at the mountain in the distance, and a piled stone mountain fell down in an instant, raising a piece of dust.

Li Yan was a little shocked, but what shocked him was not the power of the cannon, but the way the cannon was fired. The rear-mounted cannon had already surprised him, and he didn't expect that it would still be fired.

Qin Huaiyu and Zhu Youzhi were pale, and they were frightened by the scene by his army. The stone mountain in the distance actually collapsed with a sound. The distance was still very far. With such a powerful weapon, wouldn't it be like siege in the future? At this time, their eyes when they looked at Tong Yu were filled with awe. (To be continued...)
Chapter completed!