Shang Wen's lesson was only an hour this time, but he suddenly turned Qin Guo's insight upside down. First of all, people began to have a heated discussion. What is called the earth under one's feet is not the earth or the round. Some people think so. Some think not. Others have suggested that the earth is square. The sky is round. Otherwise, it won't be called Fangyuan. Prime Minister: This is pure nonsense. Some people think it makes sense. than a heated discussion. A lot of people started running to the mountains. Why. Look at the moon at night. With the help of Shang Wen's telescope, they began to look at the moon carefully. It turned out that the moon was full of potholes. Some people can't squeeze into astronomical telescopes. Just look through a telescope.

Since telescopes began to gain popularity in the army. So, a lot of civilian versions of poor quality began to enter the market. The reason why a large number of telescopes can be produced is mainly due to the two new products newly listed in the futures market. Fine and coarse salt. Fine salt is used to provide it to the people for consumption. In the Warring States period, and all the dynasties that followed. Edible salt has always been a lucrative industry. Yingyu didn't notice this more traditional industry at first, and only discovered this problem when she accompanied Shangwen on the street. As a result, a new variety of salt was soon put on the market.

But with the expansion of the Qin state, some inland lakes in the northwest were discovered. People began to find edible salt in these inland saltwater lakes. However, a large amount of coarse salt appears during the extraction process. These coarse salts contain large amounts of sodium carbonate as well as other salts. Although only two of them are utilized, there is still great value. Sodium carbonate, for example, is much more expensive than table salt. Thus, the salt was preliminarily divided. Fine salt is used specifically to refer to edible salt. And coarse salt became synonymous with early industrial salt. However, the amount of sodium carbonate that can be extracted from these coarse salts is still very limited, so some people have started to use their brains to develop other things.

It was also with the help of futures that a large number of glass and mirrors appeared in the Qin State. Glass is no longer the exclusive product of the Wang family. began to enter the homes of ordinary people. Some students who had developed a keen interest in astronomy began to imitate Shangwen's astronomical telescope. At the same time, a number of surveying retired officers, non-commissioned officers, and land officers began to accept the sextant. According to the latitude and longitude, some preliminary maps are drawn. These Shangwen didn't care. That's what he needs. Because, these things, there is a wide range of them. Specialized talent needs to be stimulated to explore.

In the field of electromagnetism. The Qin state began to manufacture compass arrows on a large scale. Thanks to the excellent sealing properties of glass. A large number of compass arrows were manufactured. However, it is not the military that is used first. Rather, it is a large number of armed security traders. They need a north arrow to indicate the direction. But large magnets can't be made. This is because there is still a lack of resin as a natural insulating material. The price of resin is extremely expensive. This thing is only available to the royal family or the minister's family. Even wealthy businessmen have only a small piece. So, this also leads to the fact that the magnet can only be made very small. Can't do a lot. This is a serious hindrance to the development of electromagnetism. However, there is still a significant development in electricity. Through unintentional experiments, Bai Ai discovered a completely new metal, zinc. There are a large number of lead-zinc mines in China. In particular, in the state of Qin, as well as the newly occupied Eastern Mongolia and other places.

The advent of zinc has made the battery a step further. At the same time, hydrogen can also be produced quickly. This is currently the main source of hydrogen in the development and improvement of glass, new airships.

In terms of gunpowder. Black powder is still the mainstream gunpowder at present. The slow progress of new gunpowder is mainly due to the great power of new explosives. Explodes at every turn, mainly nitroglycerin. So, a lot of people are reluctant to do research. In addition, there is a lack of a fiber that can be nitrated. Cotton. If this problem is to be solved, it must have a lot to do with the two river basins and India. Otherwise, smokeless gunpowder will still not be able to break through.

In fact, Shangwen has long been planning and sailing, which is currently the most effective and fastest way to obtain cotton. By sailing, it is possible to quickly reach India and the two river basins. If it passes by land, the Qin State must go all out to wash the conquest, and there is no problem in fighting. But where is the motivation to fight? Is it just for cotton. Huaxia has better silk fabrics than cotton. Obviously, cotton is not very tempting.

Just when the Qin Kingdom was busy drawing new maps and exploring the mysteries of the universe, the arrival of a person made Shang Wen feel very happy. It's not so much one person as a group of people.

After Shang Wen's invitation letter was received, Xiao He took Liu Ji and others to Qin to seek a good future. The invitation letter was sent by Shang Wen himself. So, when the doorman announced the invitation letter to Shang Wen. Shang Wen received a few very warmly.

Because the place is too cramped and tight. Shang Wen had no choice but to invite Xiao He and the others to the restaurant in the city.

Xiao He went from Peidi to Shouchun, and from Shouchun all the way west into the border of Qin. During the reign of King Zhao, the Qin general Bai Qi captured a large part of the territory of the Chu State. Then, they passed through Wuguan into Hanzhong, and from Hanzhong into Guanzhong. It took nearly a month. After entering Guanzhong, they slowed down. Because, at this time, Guanzhong has changed a lot. First of all, they saw large fields being cultivated by a group of nomadic herders from the north, and the farmers were roaming around leisurely on horseback with shotguns. The gun order in Guanzhong was changed once. Allow the Farm Master to have a certain number of guns in order to control a large number of slaves.

At this time, they also changed into the four-wheeled carriage of the Qin State, because when they came, the four-wheeled carriage could not pass, so they had to change trains, anyway, the money was Shangwen's. They don't feel distressed either. It seemed to them that it was as it should be.

The inn where they stayed was very different from the food and drink of Chu. And there is a lot of meat, and the price is very cheap. This person Xiao and others opened their eyes. And it's beef. This made Fan Xu, who had slaughtered dogs since he was a child, feel a little unbalanced. Beef isn't something you can eat casually. And here in the Qin State, ordinary stores are enough. This made them start to believe. Coming to Qin to seek a future is the right one.

Until they saw the prime minister of Qin with their own eyes, they forgot to give a gift. The reason is that the prime minister of the Qin State is dressed, and the mansion is very different from the officials and masters of the Chu State. If it weren't for self-introduction, Liu Ji would almost think that he was an ordinary street boy.

Shang Wen was not surprised. Busy greeting and arranging food and accommodation for the bit to enter the city. As soon as you enter Xianyang City. These people are all out of the way.