The coming of various countries to tribute to the Tang Dynasty is a big event. This is different from the previous letters of the Thirteen Kingdoms to marry a princess. This time they came to tribute to the court in the true sense, which made Li Er's heart very inflated. The Tang Dynasty was very strong. As an ambitious emperor, he took over the Turks. Now the north of Yinshan has become the horse farm for the Tang Dynasty. After the Tubo was pacified, Tubo has become the Tubo county of the Tang Dynasty. His majesty, who is full of energy, sharpens his sword. Wherever he sees, who dares to disobey, whoever dares to accept it will hold it in my mind. If he doesn't accept it, he will destroy you.

Li Er's attention has always been on the current Eastern Expedition.

Gu Qing was busy in the factory at this moment. It was almost mid-month. After the heavy snow, the weather was rarely warmer. Gu Qing was watching several factories burn red bricks.

The red bricks first appeared in the West, and it seemed to be in the ancient Babylonian period. However, the red bricks made by Gu Qing were the most standard clay bricks. This kind of bricks and stones are more solid, and the size is just the same. Nowadays, few people in the Tang Dynasty can use bricks and stones. Besides, even the most ordinary acres used in the palaces, it is difficult to burn and the quality is still poor.

"It's burned out." Zhang Jie dragged a piece of hot bricks and stones on a plate, "Is that true?"

The appearance was still a little worse, and the edges and corners were burned out and not handled cleanly, but the problem was not big. Gu Qing looked at it and said, "That's it, the craftsmanship is pretty good."

"We have all kinds of people in our workshop, and there are many craftsmen." Zhang Jie smiled, "Will our factory do this in the future?"

"No." Gu Qing said decisively, "I plan to sell it, it's not a big deal anyway."

"I heard from the craftsmen," Zhang Jie said again, "This brick and stone is easy to cook, and it is sturdy enough, and it is also convenient to use materials. It is better than the brick and stone we use now."

"You can't eat all the business." Gu Qing shook his head and sighed, "I have thought about what you said, but our factory size is not enough to make this. Making such bricks requires a large site and there will be a lot of dust. I am afraid of disturbing the people in the village. Besides, the Tang Dynasty originally had bricks and stones, and the bricks and stones I made can only make ordinary mud bricks more cheap, with little profit, and ordinary people can't afford them."

"I understand." Zhang Jie nodded in all his thoughts.

Gu Qing said again, "Speaking of this, how is the coal blast stove doing?"

"I was about to say it." Zhang Jie said, "It was done, but the coal cannot be burned now."

"How could it not burn?" Gu Qing walked to a corner of the workshop in confusion. There were several craftsmen here thinking. Gu Qing looked at the coal stove he made. It looked the same as he thought. The air outlet was also well done. He looked at the black line at the end of Gu Qing, "You have blocked such a large piece of coal inside. The air is not circulating, can the fire be burned?"

Several craftsmen looked at each other.

Gu Qing swung his sleeves and took out all the coals in the coal stove, then broke them into small pieces, then put firewood and hay into the coal stove to burn them, and then spread a layer of coal on it.

The craftsmen looked at Gu Qing's skillful movements until the coal in the coal stove was completely burned. As the air outlet was adjusted below, the flames could also be adjusted. The craftsmen looked surprisingly hot, and those with a little brain could see how valuable this thing was.

People use coal in the Tang Dynasty today, but the amount of mining is very small. Most people use charcoal for their households. It was not until the Song Dynasty that coal was widely popularized. It was difficult to burn coal and was generally used by blacksmiths because coal is resistant to burning and has high temperature.

Zhang Jie put his hands on the edge of the coal stove, "This thing is really good for heating."

"It can also be used to cook." Gu Qing said with a smile, "This can be sold to a powerful man, they should like it."

·"It's right." Zhang Jie nodded.

"Keep all these secrets and start auctioning soon. Don't reveal the news before and after selling them." Gu Qing ordered Zhang Jie.

"I understand!" Zhang Jie nodded with a smile.

Gu Qing wanted a secret recipe for buying and selling. This news is well known in Chang'an. The things made by Gu Qing's workshop are subtly integrated into the lives of the people again and again. This large workshop can be said to be a daily profit of gold. Except for the merchants in Chang'an, the news spread to places other than Chang'an, Taiyuan, Luoyang, Jinzhou and other prefectures all knew the news as soon as possible. The sharp-eyed merchants and some family assets immediately sent someone to the news.

Di Renjie walked in the bustling Chang'an streets. Recently, many businessmen came to Chang'an. Zhang San came to Dali Temple and said, "Shaoqing, the coroner has investigated the body, and they are all injured by knife. I think it is a vendetta among the rangers."

Nodding his head, Di Renjie said calmly, "Go and check if anyone has been missing near Chang'an recently. Find out all the identities of these people."

"Yes!" Zhang San received the order to leave.

It was almost mid-year, and Cheng Yaojin and Niu Jinda sat at home but had not received Gu Qing's invitation, and the village did not look like a big auction was held. Even the merchants in Chang'an began to worry that Gu Qing said that it was going to auction and there was no movement.

Gu Qing, who was leisurely in the village, listened to Fan Jian’s report.

"Marty, Chang'an is now looking forward to the Martyr's business, and many people have come to the village to investigate."

"Don't worry, don't worry." Gu Qing lay on the comfortable recliner. "There are still many merchants who haven't come. Don't miss the big fish. Wait for a while, and we will start when the merchant is almost there."

Fan Jian said anxiously, "But Marquis, the life outside is full of speculation..."

"If you keep telling me, I will be unwell and it will be delayed for a few days." Gu Qing was drinking the tea in the cup leisurely.

"Oh, I understand." Fan Jian was about to leave after hearing this, "I'll go and pass the message now."

Li Zhi heard Gu Qing's words and stood up and said to Gu Qing, "You are going to pretend to be sick again, you are really not a good person!"

"Your Highness King Jin, you have a misunderstanding of the judgment of good people and bad people." Gu Qing relaxed his body comfortably, "The one who tells lies is not necessarily the bad people, but the one who tells the truth is not necessarily the good people."

"The one who tells lies is not necessarily a bad person, and the one who tells the truth is not necessarily a good person." Li Zhi thought in confusion and said to Gu Qing, "No matter which one is a good person or which one is a bad person, you are a bad person anyway."

"This kid's three views still need to be cultivated." Gu Qing flattered in his heart, "Your Highness King Jin, is the jelly delicious?"

"It's delicious," Li Zhi nodded.

"Then you said I made such delicious jelly for you. Do you think I am a bad person? You eat and drink for free and say I am a bad person. Your Highness Jing, your conscience will not hurt.
Chapter completed!