"This salt field is so big, and the white salt looks like a snowdrift!" After coming to the salt field here, except for Li Hao, everyone else was shocked.

There are hundreds of acres of salt pans in the whole salt field, and everywhere you can see white hills shoveled into piles, and those are salt piles. This place was also the largest salt field in the south in later generations, and it was naturally at this time, but now it has not been developed to half of the later generations.

With little rainfall and strong winds, it is the area with the largest annual steaming volume on the island. According to Li Hao's students' calculations, the daily limit of steaming in Yantian reached 10 mm. In other words, all salt pans can steam thousands of tons of seawater a day.

The salt content of the seawater here is about 3.5 percent, and 35 tons of salt can be produced from 1,000 tons of seawater. The output is reduced on cloudy days, and it cannot be produced on rainy days. But on average, it should be able to reach half of the limit per month, that is, more than a dozen tons of sea salt.

Moreover, the scale of the salt pans can continue to expand, and theoretically speaking, Li Hao and his team can take advantage of the cost advantage to monopolize the production of sea salt on the entire west coast of the Pacific Ocean and unify all the salt needs of Datang......

In addition to salt production, the fishing industry is also very thriving. Because of the salt and fishing grounds, a small town has gathered here in a short time, and many merchants from other places have come here to buy salt and sell it in the mainland. Because the salt here is of good quality and the price is cheap.

This is another change brought about by Li Hao using what he knows, in fact, if Li Hao hadn't made this big salt field out in advance, the Yingge Sea Salt Field would really be discovered, and it would have to wait until the next generation. Now this place has been advanced by thousands of years, and although it cannot be produced on a large scale using mechanization like later generations, it can also become the largest salt farm of this era.

Li Hao stayed here for a day, looked at the various conditions here, and then looked at the lives of those salt workers. Seeing that there was nothing he couldn't see, he didn't stay here any longer, but set off for the shipyard.

"Brother-in-law, that boat is so big!" After looking at the salt works, the next stop is the shipyard. Before the group reached the place, they saw several large ships under construction in the distance, and one in the harbor farther away, which was as magnificent as a palace.

If Li Hao hadn't said that those were all boats, their group would have thought that it was a newly built building complex. A ship the size of a palace, except for Li Hao, no one else had even heard of it.

"Well, this ship should be the biggest ship of the day, no one compares!" Li Hao looked at the big ship from afar and said proudly, even after a few hundred years, this ship will still be the largest ship in the world, until a thousand years later, this is Zheng He's treasure ship.

In order to replace this set of technology, Li Hao exchanged half of the points he had stored to get the manufacturing process. And then after many experiments by his students and technicians, this is a real high-tech. You must know that this technology is not fully mastered in later generations, and can only rely on historical data to slowly restore it, let alone now.

The largest Zheng He's treasure ship recorded in the historical books is 44 zhang long, 18 zhang wide, and has 9 masts and 12 sails. In this way, this ship is the same size as the aircraft carrier of later generations, but it is very likely that this large treasure ship is not Zheng He's flagship, but the seat ship of the Ming Emperor!

This type of ship does not usually go to sea, but serves as a ship for the emperor to inspect the navy in the harbor. After all, the size of 44 zhang long and 18 zhang wide does not meet the standards of sea ships and cannot withstand wind and waves. The second is that the length-to-width ratio is too large to nearly 1:2, not like a sea ship, but like a palace.

In addition, the size of this ship obviously exceeds the size of the Taiji Hall of the Forbidden City, which belonged to the encroachment in the Ming Dynasty, and Zheng He could not live there, only possible for the emperor. And the two numbers of nine masts and twelve sails have great symbolic significance, nine symbolizes Kyushu, and also symbolizes the emperor's words and nine tripods, and nine is the symbol of the dragon; The twelve sails symbolize the time and space of the universe, such as twelve hours as one day, December as a year, and twelve years as a round.

Therefore, this largest treasure ship was not actually used to go to sea to the West, and the symbolism was more than practical application. The size of Zheng He's treasure ship in the Western Ocean should be about 70 meters long, nearly 20 meters wide, with five to six masts, and a displacement of 2,500-5,000 tons. Still, these ships are the largest.

Such a large wooden ship travels on the sea, and naturally it has its supporting first-class technology to correspond. The accumulation of oriental civilization in more than 1,000 years of seafaring experience has been applied to the extreme on this kind of ship. This is also the reason why Li Hao pulled this ship out, this kind of ship is too suitable for the ocean.

"The entire manufacturing process of this ship should be preserved, and I hope that future generations will carry this forward." Li Hao looked at the big ships and said to the students around him, but this kind of shipbuilding technology in another time and space has been completely submerged in history, so that later generations can only restore these technologies from historical data and archaeology.

This is the result that Li Hao doesn't want to see, otherwise he wouldn't need to spend so many points in exchange for this technology. The movement of wooden sailing ships at sea mainly depends on the sails with the help of the wind and the sailors' paddling. In these two important aspects of the power propulsion system, Zheng He's treasure ship adopts a unique design.

Unlike the segmented soft sails used in other sailing boats, Zheng He's treasure ship used a stiff sail structure with a canopy with struts. Although the sail is heavier and difficult to lift, it has a very high wind efficiency and increases the speed of the boat. And the mast is not set up with a fixed cross girder, which can adapt to the sudden change of wind and clouds at sea, and the adjustment and turning of the foot are flexible, and can effectively use the multi-faceted wind.

The oars of this ship are also different from other ships, and Zheng He's treasure ship is equipped with long oars on both sides and stern. This kind of long oar enters the water depth, many people swing, and the action of the oar in the underwater semi-rotation is similar to today's propeller, and the propulsion efficiency is higher. It can also maintain a considerable speed when there is no wind, and the wading area of the oar outside the ship is small, which is suitable for sailing in the crowded waters of narrow harbors.

There is also a special ship-shaped structure, the general bottom is pointed and wide, the head is high and stern is high + transverse bulkhead, and the shape of the ship affects the speed of the ship and the stability of the hull. Zheng He's treasure ship adopts the shape of a ship with a sharp bottom and a wide upper top, and a high stern at the top.

This shape of the ship had a high level of stable control in rough seas, and the stability of the ship was second to none at the time, and the earth and rock were ballasted in the bilge of the ship at the time. In order to further improve stability, Zheng He's treasure ship also used terrier water wood and two-sided water decks. This plank, which faces the side of the ship, further reduces the amplitude of the hull swinging to the sides.

In addition, Zheng He's treasure ship is also different in the design of the main scale and proportion of the ship according to different ship types and navigation areas, so as to take into account the speed and stability. In general, transport ships emphasize more on stability, while warships emphasize more on speed.

The hull structure of Zheng He's treasure ship also had a unique design at that time, that is, it was equipped with multiple transverse bulkheads. The interior of the ship is divided into different cabins with wooden planks and sealed against each other. This not only strengthens the structure of the ship, but also has the effect of watertight and anti-sinking of the compartment. This design also facilitates the sorting of loads. For example, tea, silk, and tribute treasures from various countries can be stored separately.

The ship mainly relies on the rudder to control the direction of the ship on the sea, and the rudder of Zheng Hebao's ship is also significantly different. The rudder of Zheng He's treasure ship adopts a liftable type, and the depth of the rudder blades can be adjusted according to needs.

When the ship is sailing in deep water, when encountering strong winds and waves or turbulent currents, the lower edge of the rudder blade is lowered below the bottom of the ship, so that the rudder can not be affected; When sailing or anchoring in shallow water, the rudder can be raised to a high position so that the rudder blades will not be damaged by grounding.

Moreover, the rudder of Zheng He's treasure ship is a balanced rudder, which is inherited from the invention of the Song Dynasty, and the control is relatively light, and the Ming Dynasty further invented the open-hole rudder, which can not only maintain the rudder effect, but also make the rudder more light.

In addition, on Zheng Hebao's ship, stone ingots (anchors) with claw wooden rods and multi-claw iron anchors with horizontal rods were widely used on sea ships, and extra-large iron anchors were also made, which were the leading technology in the history of shipbuilding in the world.

It's a pity that the treasure ship technology that should have been more brilliant was completely destroyed in the hands of those brains, which is the biggest loss in the development of Dongfang science and technology, otherwise in the years to come, Dongfang would not have been abused in various naval battles.

With a large wooden ship nearly 100 meters long and a displacement of nearly 10,000 tons, this kind of ship can almost be compared with the aircraft carriers of later generations. The fact that such a large ship was built out of wood has brought the skill to the extreme, which shows how advanced the technology of the Eastern civilization was at that time.

As early as the Han Dynasty, the construction process of Chinese wooden sailing ships used the comprehensive technology of mortise and tenon iron nails. After the Ming Dynasty, the development of ship technology has spade nails, iron curvels, shovel nails, leech nails, etc., so that the more complex wooden structure can be strengthened by various ship nails and hanging curiums, so that the scale, tonnage and performance of Chinese ancient wooden sailing ships have reached the world's leading level.

Thousands of years of technological precipitation, after the Ming Dynasty finally burst out of dazzling light, but unfortunately, this light is only a flash in the pan, and then completely disappeared in the long river of history.

"Brother-in-law, can we go up to this big ship and have a look? With such a big ship, standing on it must be the same as standing on the shore. As the group got closer and closer to the shipyard, someone at the door had already come out to stop them, and then interrupted Wu Yue's words.

"This is an important place, no entry is allowed without permission!" The people guarding this side are those soldiers who were replaced by Li Hao, and the technology of this place is a strictly secret place, and anyone who breaks in without permission can shoot them directly.

This is the power granted by Li Hao to this shipyard, except for the real own people, everyone else is on guard. He didn't want the technology here to be stolen back by those Fanbang people, so he naturally wanted to take good care of this place.

Li Hao didn't play his prestige, nor did he use his privileges to discipline the few guards who didn't open their eyes. He has a token to pass through this side, and then asks the guard to notify the person in charge of this side to come and bring it in, and the others can follow in.