In the end, in the discussion of the new emperor Qin Yu, the general Yu Zhan and Xingzhe, Xingzhe's proposal was finally approved, and he was ready to take the Neon Kingdom.

For the next period of time, Xingzhe was very busy, because he had to go to sea to fight, and there were many more things to prepare than to fight on land, so it was also much more troublesome.

Xingzhe felt that he had never been so tired, and many times in order to understand the combat methods of the naval fleet, Xingzhe even fell asleep directly on the desk.

Now even Xi Yao has developed a habit of waking up once a night and then seeing Xingzhe lying next to him.

If Xingzhe is not lying next to Xi Yao, then he must be asleep on his stomach on the desk, and Xi Yao will put Xingzhe on the bed so that Xingzhe can sleep more comfortably.

Xingzhe has now become a disobedient marquis again, but the previous marquis's mansion has become a ruin, so the new emperor Qin Yu personally found craftsmen to build a new marquis' mansion for Xingzhe.

The scale of the new Marquis's Mansion is not particularly large, but it is more than enough for Xingzhe, and it is fully equipped, with mountains, rivers and forests, like a miniature version of a private garden.

Xingzhe had already taken Xi Yao to live in the Marquis's Mansion, and Feng Wu and the others did not go to visit Xingzhe less, and when someone visited Xingzhe, Xi Yao hid in the room alone, unwilling to come out to meet guests.

It is still very easy to hide a person in the Marquis's Mansion, so many rooms, even if you turn them one by one, it will take some time.

Wan'er also came several times, and each time Xi Yao was very entangled, she didn't know whether she should tell Wan'er or not, and every time she was very hesitant, just like when Libra made a choice.

Xingzhe will never urge Xi Yao, he will not put any pressure on Xi Yao, when Xi Yao has figured it out, he can tell Wan'er when Xing Zhe respects Xi Yao's decision.

Xingzhe plans to take Yun Yun to the Marquis's Mansion as well, but he still needs to prepare, so he still needs to wait a few days.

On Shu Ya's side, Xingzhe often brought good wine and food to visit Shu Ya's father, because Shu Ya's father was the only time-traveler that Xingzhe knew except for Xingzhe himself.

From Shu Ya's father, Xingzhe not only knew a lot of taboos about traversers, but also many kinds of precautions for deeds, so that Xingzhe could better understand his unique powers.

Except for the woman's affairs, Xingzhe put all his experiences on the sailor fleet that was about to depart.

The compass used by the Datang naval fleet is very backward and very prone to deviation, which is a very troublesome thing for the naval fleet.

In fact, not only Datang, but also in this era of this world, the compass used is almost the same, very backward, which causes ships to often get lost at sea.

Xingzhe in other countries can't control it, but Datang is indeed Xingzhe's business, so Xingzhe used the basic knowledge he learned in physics textbooks to make a simpler, but more accurate compass.

The compass is composed of three parts, namely the Tianchi, the inner disk, and the outer disk.

Tianchi is also called the bottom of the sea, which is also the compass. The Tianchi of the compass is composed of a thimble, a magnetic needle, a sea bottom line, a cylindrical outer box, and a glass cover, which is fixed in the center of the inner disk. There is a pointed thimble in the center of the bottom of the round box, and there is a concave hole in the center of the bottom surface of the magnetic needle, and the magnetic needle is placed on the thimble. The direction of the compass with an arrow pointing south and the other end pointing north.

There is a red line painted on the bottom surface of the Tianchi, called the sea line, and there are two red dots on both sides of the north end, so that the north end of the magnetic needle coincides with the sea bottom line.

The Tianchi of the modern compass is painted with a crosshair, and the top of the crosshairs is printed with the southeast, northwest, and northwest, respectively, and the north end of the magnetic needle should point to the north end of the Tianchi crosshair, and the magnetic needle coincides with the north-south line of the seabed.

The inner disc is the disc that can be rotated immediately outside the compass. There are many concentric circles printed on the inner plate, and one circle is called a layer. Each layer is divided into different equal parts, some have more layer grids, some have fewer layer grids, the least is only divided into eight grids, and the most layers have 384 grids. Each grid is printed with a different character. There are many types of compasses, some have more layers, some have less, the most has 52 layers, and the least has only 5 layers.

The various contents of the compass are engraved on different rings of the inner disc and are the main components of the compass. Each school of feng shui included the main content of its own school on the compass, making the Chinese compass a large encyclopedia of Chinese magic.

The outer plate is square, which is the tray of the inner plate, and there is a small hole in the middle point of each of the four outer sides, which penetrates the red line to become Tianxin Shidao, which is used to read the contents of the inner plate surface. The ten paths of Tianxin are required to be perpendicular to each other, and the new compass you just bought must be calibrated to the outer disk before you can use it.

The compass is a basic tool for measuring the magnetic azimuth of the earth's surface, and is widely used in various fields such as military, navigation, surveying and mapping, forestry, exploration, construction, etc.

The compass is actually a tool used to measure the square position of the ground using the principle of compass positioning, and the compass is used in feng shui for the grid, sand removal, water storage and determining the sitting orientation of buildings.

Datang's compass is still very inaccurate, although it can be used for daily sea transportation, but that is also because the sea transportation routes are fixed, and there are sea lighthouses to guide the direction.

However, fighting at sea is different from sea transportation, there is no planned route, let alone a sea lighthouse to guide the direction, everything can only rely on a nautical chart and a compass.

When Xingzhe was in junior high school, the physics teacher taught them how to make a simple compass, even a simple compass is far more accurate than Datang's current compass.

In fact, in addition to a simple compass, Xingzhe also learned to make a simple kaleidoscope, a simple telescope, a simple periscope, and a simple slingshot gun in physics class......

Thinking of the slingshot gun, Xingzhe suddenly thought of one thing. Although Datang has muskets and artillery, the number is not very large, and the musket ammunition is also very expensive, and it is not possible to have a musket per person.

However, the combat power of the musket is very powerful, not only easy to carry, but also amazingly lethal. However, Xingzhe can't make a musket, but a slingshot gun does.

With Xingzhe's ingenuity, as long as he increases the elasticity of the rubber band on the basis of the simple slingshot gun made before, and then increases the stability of the slingshot gun, it can become a powerful hidden weapon.

Xingzhe thought of it, and was about to start working, anyway, it would take some time before the departure of the naval fleet, so Xingzhe decided to strengthen the thirty remaining pro-guards before him and turn them into a special force.