Compared with the guilt and anxiety in Yang Miaozhen's letter, Chen Xian was much calmer, although the all-powerful cavalry was far stronger than Chen Xian thought at the beginning, he was not afraid.

It would not be a bad thing if Wanyan Pingtao could train an all-round cavalry of the Eight Banners to attract the attention of the Mongols.

If Chen Xian knew that Wanyan Pingtao was fighting at this time, it is estimated that he would clap his hands and feet in agreement.

As for Wanyan Pingtao will bring the Eight Banners all-round cavalry to fight him, Chen Xian is not afraid at all, first of all, he believes that the Morris phalanx combat method he is currently using still has a great advantage in the face of the all-round cavalry. If it really doesn't work, he still has a flintlock pistol.

After reading Yang Miaozhen's letter, Chen Xian silently drew the drawings of the flintlock pistol and arranged his own secret test factory for trial production.

After replying to reprimand Yang Miaozhen, Chen Xian left the matter behind, he had more important things.

Just a month ago, Chen Xian's army had taken Jiaoxi County.

After getting the news, Chen Xian couldn't wait to run to Jiaoxi County in person, going back and forth around the future Jiaozhou Bay.

He was choosing a location to build a port and a shipyard.

While personally selecting the site, Chen Xian also asked his subordinates to search for shipbuilders around Jiaozhou Bay.

Chen Xian's order was not untargeted, and one of the four major cities established by the Northern Song Dynasty, Mizhou City, was located in Banqiao Town, the county seat of Jiaoxi County.

Although the city of Mizhou was deserted after the Jin occupation of Shandong, it was not shut down, and it is still the largest trading port in northern China.

Although the shipbuilding industry here has declined a lot compared to the Northern Song Dynasty, it has not completely declined.

Therefore, Chen Xian's subordinates recruited many shipbuilders.

While searching for shipwrights, Chen Xian also asked people to forcibly collect some shipwrights from private shipyards at a high price.

After some on-the-spot investigation, Chen Xian violated his private agreement with Wanyan Pingtao to "not occupy the county seat", and directly sent troops to occupy Banqiao Town, the county seat of Jiaoxi.

After that, he transferred thousands of construction workers from his rear to build a road from Banqiao Town to the location of the future Qingdao Port.

Today's Qingdao city is still barren, and the main ports in Jiaozhou Bay are at the bottom of the bay, near Banqiao Town, which was later near Jiaozhou City.

After the road was built, various building materials were continuously sent to the Qingdao area.

Chen Xian first built a castle in the northwest of Qingdao near the coast, and then he began to build a port and a dock on the basis of this castle.

In the materials transcribed by Chen Xian, there is a simple principle of dry dock construction.

A dry dock is not complicated, it is a simple dock that takes advantage of the characteristics of the tides.

First of all, a boat pit was built on the seashore surrounded by earthen embankments on three sides, and one side opened to the sea, and the ground of the pit was about the same level as the sea level at low tide.

When building a ship, the side leading to the sea is fenced off from the sea by an earthen embankment, and the ship is built in a dry pit.

When the ship is built, the dam is dug at low tide, and when the tide rises, the sea water pours into the pit and the ship is floated by the seawater, and it can be driven out of the dock......

Chen Xian has plenty of manpower in his hands, and he has an industrial skeleton like cement, so there is naturally no problem in building a dock.

At the same time as the construction of the dock, Chen Xian began to prepare the ship's materials, and he asked people to harvest the mature elm wood on Laoshan Mountain and Zhushan Mountain, and build a warehouse to store dry wood.

After the dock was built, Chen Xian took out his own design drawings.

The shipbuilding technology of the Song Dynasty is naturally far behind that of the Age of Discovery, so Chen Xian's search for shipbuilders in this era is not to let them build their own ships, but to combine the shipbuilding design of the Age of Discovery with the shipbuilding technology of this era.

The shipbuilding process of the Age of Discovery, first of all, starts from the keel, which is divided into three parts: bow, stern and keel.

After fixing the keel with the support of a wooden frame, the next step is to lay the bottom ribs, and as wide as the bottom ribs are, the flat bottom of the ship will be as wide as the bottom ribs.

With the stern pillar as the core, the stern bend bone should be built to determine the shape of the stern, and then the stern bend bone and the stern post will be combined through the stern crossbar, and the stern windfall will pass through the stern post, firmly combining the three.

This is followed by the laying of the ship's curved frame, the ribs, which outline the shape of the ship, followed by the laying of the deck beams that support and run through the entire length of the ship.

After laying the ribs and deck beams, it is time to lay the outside of the boat, which is the skin of the sailboat.

The plank adopts the flat jointing method, that is, the board edge to the edge is connected together, and the blast window is reserved.

After the planking is completed, the main body of the sailboat is completed, and the next step is to deal with the sealing performance of the hull.

The waterproofing process is a two-step process, in which a linen cloth dipped in grease is driven into the cracks of the wood with a chisel.

The second step is to coat the hull surface with asphalt.

Chen Xian couldn't find asphalt, but the craftsmen of this era also had their way, which was to replace asphalt with raw paint.

First use raw lacquer and porcelain clay to mix to make a thick lacquer, first paint the surface of the hull with thick lacquer, after drying, then use raw lacquer to paint the inner and outer surfaces of the hull, then dry, and then paint, and so on ten times.

After the main body of the sailboat is built, it is time to erect the mast and hang the sails.

Erecting the mast is a very dangerous job, once there is a problem with the spreader of the mast and the mast falls off, the mast will be like a spear, poking through the bottom of the ship and piercing into the bottom of the sea, and the ship will be reimbursed.

If the installation is successful, the mast will be inserted into the reserved hole in the keel and will be firmly fixed to the keel and deck.

For sails, Chen Xian plans to use hard sails first, soft sails are too complicated, and he also knows a little about them, if soft sails are used from the beginning, Chen Xian feels that if he is given several years, he may not be able to build a usable fleet.

Moreover, the advantages of soft sail are mainly reflected in large large sailing ships, and it is impossible for Chen Xian to build large sailing ships of hundreds of tons in a short time.

In fact, the first plywood sailing boat built by Chen Xian was more than ten meters long, and even in this era, it could only be regarded as a small and medium-sized boat.

Chen Xian led the shipwrights he collected and worked hard for three months to build the first sailing ship.

On the one hand, because it is a test ship, on the other hand, Chen Xian does not have too many ready-made ship materials in his hands, and the number of finished ships collected from private shipyards is not large, so Chen Xian needs to use Haogang to the blade.

Therefore, the wood of this test sailing ship is mainly pine, and the wood has not been treated.

When building the ship, Chen Xian replaced the original wooden nails and mortise and tenon structure with a large number of iron components to increase the strength of the hull.

Compared with the ships of this era, the biggest advantage of the cover steamer of the Age of Discovery is that it is sturdy and excessively strong.

The shipwrights were completely incomprehensible to Chen Xian's laborious and laborious construction of such an overly sturdy ship.

In fact, such a sturdy construction allowed the sailboat to withstand the more powerful gun recoil.

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