Clone: Instinctive infrastructure unit. Can only perform tasks according to orders, there is no sense of autonomy. It can produce and construct all artifacts within the existing technology range, and can also be trained into militia and soldiers. Production needs: 1000 kg of grain/person. Consumption: 1.5 grains/month. Lifespan: 1 year. Not of childbearing potential.

Yuan Yao's clones now have 35 people, and according to the production of one person a day, it means that Yuan Yao has been "waking up" for more than a month.

Since Chen Yi asked Yuan Shu for a blank check "Jiangdong", Yuan Yao began to think about how to take the achievements created by Sun Ce in history as his own, and the "system" is naturally Yuan Yao's golden finger, so the first thing he has to do is to think about how to effectively use the system, that is, the application of cloning people and the selection of the technology tree.

The system technology tree is divided into "technology" and "system".

As the name suggests, technology belongs to this category of papermaking and so on, and the system can automatically study it after clicking.

The system needs to be artificially popularized, for example, Emperor Wu of the Han Dynasty's exclusive respect for Confucianism and the like belong to the category of the system, which needs to be formulated by the imperial court and then popularized throughout the country to be considered perfect. This work system cannot be done, and it requires administrative skills. In other words, it has to be carried out by Yuan Yao personally, and it cannot be automatically relied on by the system.

As mentioned above, the Eastern Han Dynasty belonged to the imperial era in the science and technology tree, and had already crossed the early eras of "primitive", "slave", and "feudal", and already had the main technologies and systems in the early imperial period, such as theology, civil service, guilds, and metal casting, which had been studied or popularized. The rest to be studied belongs to the late imperial technology, mainly the compass, mechanics, physics, and steelmaking; The systems that need to be popularized are the education system and the knighthood system.

Yuan Yao didn't need to think about it, what he had to do now was to choose one of the four technologies of "compass", "mechanics", "physics" and "steelmaking" and hand it over to the system for research.

"Compass" belongs to the navigation technology, after the study can improve the ability to sail at sea, and can make sailing ships, build harbors and other functions, and now the Han Dynasty ships are still galleys.

It took 183 days to study the Compass technology.

"Mechanics" can improve the effectiveness of the equipment, and crucially, it can also activate several of the most famous crossbows in history - the Zhuge Repeater and the Divine Arm Bow.

It takes 237 days to study mechanical technology.

"Physics" is the foundation of the future, the enlightening discipline of natural sciences. However, physics in the Imperial Age was not very useful, and it was possible to improve large equipment such as trebuchets, bed crossbows, and ballistas.

It also takes 237 days to study physics.

Steelmaking in the late Han Dynasty has been able to use 100 steel-making and steel-frying technology, the famous Han ring head knife is a steel weapon, there is still a steel-filling method to complete the steelmaking technology of the imperial era, so the research time is also the shortest, only 79 days.

The reason why the compass is slightly shorter than the mechanical and physical time is mainly due to the compass, one of the four great inventions in China, which shortened the time schedule for the compass by more than 50 days.

From a perceptual point of view, what Yuan Yao wants to study most is mechanics, because he can make Zhuge Repeater! This thing is very famous in the history of the Three Kingdoms, it is simply an ancient heavy machine gun.

As for physics, it is only an improvement of the siege equipment that already existed in the Spring and Autumn Period, so it is not urgent to use it for the time being; Although the time required for steelmaking is the shortest, there are already frying steel and 100 steelmaking, and the unfinished steel filling method only increases the output of steel, so it is not the most urgently needed.

The rest is the compass, considering that the next goal is to enter Jiangdong, the technology related to the navy should be the most urgently needed.

After studying the compass, you can make an all-sail battleship, and in the face of the current galleys, there should be a technical advantage, although there is no way to make artillery for the time being, make a first-class battleship or something, but if you can get the bed crossbow on the ship, can you create a catapult battleship?

As soon as this idea appeared in Yuan Yao's mind, he couldn't get rid of it anymore, but he wondered, why didn't there be a warship like a catapult battleship in history, isn't it realistic?

Yuan Yao decided to try it himself.

So in the end, Yuan Yao made up his mind to put the Zhuge Repeater aside, and first studied compass technology to enhance the construction of the naval army.

There is a lake in the southeast of Shouchun called Wabu Lake, the total length is more than 20,000 zhang, the water surface is the widest 2,600 zhang, the narrowest place is only more than 100 zhang, there are tributaries that can go straight to Huaishui.

Yuan Yao bought a ready-made dock here and recruited some shipwrights, preparing to try to build a catapult battleship to collect data, and the clones produced by the system were used to make bed crossbows and ballistas, and they couldn't help with shipbuilding, so they could only use hired shipwrights to build them, because clones couldn't make things that weren't in the tech tree, and they couldn't teach them, they didn't have the ability to learn, just like robots, they could only work according to the program given by the system.

But they also work as accurately and steadily as robots, and the performance of ordnance such as bed crossbows is slightly better than that of natural man-made ones.

The concept of the Han Dynasty to build warships was to find a way to move the city to the water, and to turn the water battle into a siege war, so the higher the floor of the warship, the better. Single-story warships are called shipwhelms; Double-decker fighting ships; If there are more than three floors, it is called a building ship.

Siege engines cannot be placed in these floors unless the floors are lengthened and widened, but then the ship will be too top-heavy and prone to overturning, and even if it does not flip, it will not be able to aim and shoot due to excessive shaking.

According to Yuan Yao's design requirements, the shipwrights gave a plan that the superstructure on the existing hull was canceled, and the lower floor remained unchanged as the oars room, and then the left and right rows of siege engines were installed on the deck, the sails were placed in the bow, and the stern was placed in the command cabin and stern rudder and other necessary buildings, and finally a dhow sail upper deck catapult battleship was designed. This design is conservative and does not change much, but it has the highest success rate.

And what Yuan Yao wanted to experiment most was a sail battleship, so the design he gave was to change the pulp room on the lower deck into a battle deck for siege engines, and the superstructure was also canceled except for the functional buildings that must exist, and a mast was placed in the front, middle and rear to hang sails. This design is completely copied from the three-masted sail single-deck artillery battleship of later generations, and the design theory is verified by history and there is no problem at all, but Yuan Yao is worried about whether the technology of the Eastern Han Dynasty can be successfully mixed and matched with the future theory, so it still needs to see the results.

Yuan Yao decided to build one for each of the two designs, the galley battleship was equipped with a ballista, the sail battleship was equipped with a bed crossbow, and the trebuchet was too large and poor, and now the experimental ship was too small to consider for the time being.

The bed crossbow is an enlarged version of the crossbow, which has been used in the Spring and Autumn Period of China, and is a heavy spear and arrow fired by the elastic force of the bowstring, with strong penetrating power, and the farthest range can reach nearly 1,000 steps, but this range is to hit a large target such as a city or military array, and the ship must be tested to an accurate and effective range when shooting a ship on the water.

The ballista is a larger version of the slingshot, historically invented by the Greeks in the 4th century BC, and it is included in the system, but not in the Han Dynasty, so only clones will do it.

Ballistae rely on torsion to fire stone projectiles ranging from 10 to 100 jin of stone. The so-called torsion force is to twist two bundles of horsehair, leather rope or animal tendons, and the reductive elastic force generated after release is torque. The firing range is much closer than that of the bed crossbow, only two hundred paces away, but because of the use of stone bullets, the destructive power is much greater, just like the solid shells of later artillery.

The two siege weapons also differed in size, the bed crossbow was wider, and only four could be side-by-side on one side of the test ship, and a total of eight on both sides; The ballista is narrow and long, and it can be staggered left and right like a zipper on the same hull, which means that five ballistas can be placed on a single string, which is an order of magnitude more output than a bed crossbow.

The bed crossbow and the ballista have their own advantages and disadvantages, and because it is an experiment, Yuan Yao decided to put the two on the two ship types separately and speak with the facts. As the saying goes: "It's a mule or a horse, pull it out and slip it."

This is what Yuan Yao has been doing mainly this month since the last morning meeting.