These little things are not used to coax children to play house, but are related to Xu Qilin's great cause of being appointed as an official and promoted to the title. I didn't expect to be so thoughtful, but now with the conditions, Xu Qilin will do the best.

"Dad, mom, look, is that Chang'an?" Sanni suddenly pointed at her, her tone full of excitement and expectation.

Sun Li put down the carving knife in his hand, looked at it for a moment, and turned his inquiring gaze to the man.

Sun Asi nodded and sighed: "I haven't been here for several years, and I may not even recognize you."

In ancient times, especially farmers, people lived a self-sufficient life and transportation were not convenient. Some people spent their entire lives wandering around a radius of dozens of miles.

Craftsmen like Sun Asi have traveled around the world, traveled hundreds of miles, and visited Chang'an, and have seen the world.

Even Xu Qilin, whenever he saw this majestic international metropolis, whenever he walked to Zhuque Street, which was about 150 steps wide, he could not help but be impressed by the style of the Tang Dynasty.

You know, this was more than a thousand years ago!

Only Chang'an in the world has more than one million people, rows of shops, can you see the countries, ethnic groups, people of all skin colors gathered here, and can you appreciate the graceful demeanor that embraces all rivers.

After entering Chang'an City, except for Xu Qilin and the original servants in the mansion, Wu Song and Sun A Si's family had no eyes.

Sanni was excited for a moment, and was stopped by her parents. She did not dare to scream, but her little head turned happily. Looking at this and that, her expression changed.

Xu Qilin asked the servants and the vehicle to go home first, and only brought Wu Song and a family with him, and then arrived at a very famous jewelry shop.

"Young Master Xu, please come in." The guy nodded enthusiastically and respectfully, making Xu Qilin admire his memory. He only remembered him after only one visit.

"Can the shopkeeper be there?" Xu Qilin walked into the store and asked.

"Here, now, come soon." The guy responded repeatedly and asked someone to call the shopkeeper.

Time is not long, and the shopkeeper walked out of the back room with a box. When he saw Xu Qilin, he was very kind and respectful, "Erlang is really on time. The items you want have been ground. The villain is waiting for you to pick them up!"

Xu Qilin reached out to take the box, opened it and saw several concave and convex crystal chips of different sizes lying on the bottom of the wooden box made of red silk, all looking very crystal clear.

"The size is all according to your requirements, not bad at all." The shopkeeper was showing off his skills, boasting about his own craftsmanship. "There are always more than a dozen times of coarse grinding, fine grinding, and water grinding, just now..."

Xu Qilin picked up a lens and looked at him. The instantly enlarged pores, the smooth and traceless surface, and the relatively straight focus made him feel satisfied.

"Your store's skills are indeed well-deserved." Xu Qilin put the lens back and signaled his family to pay for the money to pay. "If there is a transparent crystal in the future, I will send someone to inform you, and the price will not be a loss."

The shopkeeper took the money and didn't count it, so he smiled and said, "But there is the crystal that Erlang said, the villain will definitely give you a prophet."

Xu Qilin nodded, got up and handed the box to Wu Song, bowed to the shopkeeper, "I'm sorry, I'll say goodbye today."

"Erlang walk slowly." The shopkeeper's Gong sent him outside the door and returned to the store.

Xu Qilin was very anxious and excited. All kinds of objects were ready, and the first telescope in the world was about to be born in his own hands.

"Erlang, is this thing very precious?" Wu Song asked with a guess as he saw that the money was very large for the shopkeeper.

"It's just a rare thing." Xu Qilin tried hard to say in a plain tone: "If you want to do more, it's very difficult."

Of course, transparent crystals are expensive and small in quantity. The lenses we grind nowadays are made of small materials, and the cost is not much. The effect of the product is at best equivalent to children's toys in later generations.

If you want to produce transparent glass and have a relatively close nature to optical glass, Xu Qilin will not fail.

But to be truly successful, it takes thousands of experiments. He doesn't want to spend that time and energy yet. More importantly, financial resources are not allowed.

This has to talk about the major essential skills of time travelers, such as steaming wine, matching gunpowder, making steel, burning glass, making soap, and making cement.

If someone says I don’t know anything about these things, then you can only say that you are illiterate and have never even attended junior high school.

The so-called "yes" does not mean that you have done it yourself, but that you know the principles or the materials and formulas, even if they are not absolutely accurate.

As long as you have been to junior high school and can graduate, you will have a foundation in physics and chemistry. You will probably know that glass is made of sand (quartz sand) and soda, and you will know that limestone and clay are the main raw materials for cement.

That's all. Do you have to burn it with your own hands to be considered capable?

The ancients did not know much, and they relied on exploring to make glass, cement and other things go from scratch.

A modern person cannot rely on his own knowledge to study and experiment. Even if he has been poor for several years, decades, or decades, he still doesn't believe that he can't come up with the same thing.

Of course, if you master more knowledge and even read several time travel novels, then you are already standing on the shoulders of giants, and you will achieve twice the result with half the effort when doing inventions and creations.

When Xu Qilin returned to the Xu Mansion, his mood was a little calmer. He had finished washing and changed into sweaty clothes. After listening to the report of the mansion's manager, he realized that his younger sister had gone to the palace today and his elder brother had not come back at the Hongwenguan either.

"The Zhao family porcelain kiln outside the city sent a batch of porcelain bottles, saying that it was customized by Erlang, and it had been received in the backyard warehouse; Boss Xu came yesterday and also sent some spices and medicinal materials, saying that it was a list made by Erlang." The official in charge of the mansion took the list and handed it to Xu Qilin to check it out.

Mint, camphor, borneol, honeysuckle, sandalwood, orange peel, musk...

After reading it, Xu Qilin nodded slightly. Even if his memory is not complete enough, it is not a problem to make a copycat version of Liushen Hualu. Anyway, Tangren has never used it, so no one questioned what flavor he made.

"Boss Xu still left a message, wanting our chef to help in the restaurant for more days." The manager hesitated for a moment and added: "Or, just ask Erlang to leave the chef in the restaurant."

Xu Qilin smiled and said, "I have someone tell you something to Boss Xu. If the chef is willing to stay in the restaurant, I will not object."

But he taught some cooking methods. Xu's family is not a chef, even if he teaches him now, he will go there. As long as the treatment given by Boss Xu is good and the chef is willing to change places, Xu Qilin will not force him to stay.

The manager stepped down. After eating, Xu Qilin plunged into the workshop, took out the cardboard tube, fish bladder glue, paper tape and other items that had been prepared, and began to assemble toys - well, it was an epoch-making invention.
Chapter completed!