In addition to the above objective reasons, there is also a subjective reason, that is, Chang'an is the original capital of the Han Dynasty, and the Western Han Dynasty is the capital of Chang'an.

If you can return to the land of Emperor Gaozu Longxing, you will naturally be able to stabilize the hearts of the people in the world. Chang'an is not the only place to meet the geographical safety and convenient transportation, and it is precisely considering the mentality of the people of the world that finally prompted Liu Hou to make up his mind to choose Chang'an as the imperial capital.

The matter of moving the capital is settled, in fact, according to Liu Hou's original intention, he didn't want to take this issue before destroying Dongwu, but the ministers repeatedly mentioned this issue, in their eyes, this seems to be a very important issue, so, for the sake of An Qunchen's heart, Liu Hou had to solve this problem as soon as possible.

Now that this problem is solved, it is time to go all out to solve the problem of Soochow. After Liu Hou arrived in Jingzhou, he immediately sent envoys to Eastern Wu to persuade him to surrender. He still adheres to that principle: if he can solve problems without fighting, try not to fight, and give priority to labor-saving methods if there are ways to save effort.

The second thing he did was to personally supervise the construction of cement warships. By this time, two large cement warships had already been built. It must be said that the construction of cement battleships is much more time-saving than the construction of wooden ones.

The "Ship Research Institute" quickly designed a cement warship, and then it came to the construction stage. Guan Gong summoned craftsmen from all over the world to gather in Jingzhou, and it took them a month to tie the skeletons of the two warships with steel wires.

Then the cement was poured, and the two docks were still started at the same time, and due to the large number of workers, the construction could be started at the same time in multiple parts, and it took only half a month for the hulls of the two battleships to be completed.

Then it took half a month to install the mast, propeller, power turntable, anchor and other ancillary facilities, decorate the interior, and it took only two months to build two large cement ships. On average, one ship is built every month.

The size and appearance of the two newly built cement battleships are similar to those of the two "super battleships", and they also have three decks, each with fifteen gun emplacements, and forty-five guns can be placed on one side, plus a super cannon at the bow and stern, and a total of ninety-two guns ~ guns can be placed on the whole ship.

These two battleships are very similar to the original two wooden "super battleships" in various places, in fact, the researchers of the "Ship Research Institute" were able to come up with the design drawings so quickly, because of plagiarism, oh, or rather, referring to the design drawings of the two "super battleships".

Of course, it is not a complete copy, there are still some improvements, because the weight of the cement ship is much heavier than that of a wooden battleship, so, in order for the ship not to sink, its displacement is designed to be much larger than that of a wooden "supership".

In addition, there is a very different place in the appearance of the cement battleship, which has a long, sharp ramming angle in the bow, which is made of reinforced concrete, and it is believed that it will become a nightmare for the enemy's wooden warship.

After these two cement warships were completed and launched, everyone discovered a serious problem, that is, the speed of these two ships was very slow, and it was outrageously slow. These two ships still adopt "dual power" like the "super battleship": use human or animal power to push the turntable, thereby driving the propeller to rotate; Driven by sails.

In "dual-powered" mode, the wooden "Super Battleship" can run faster than all Soochow ships, and even faster than their Shippers. However, the same "dual power" is not enough to see on a cement ship, and its speed is only half that of the wooden "super battleship", and even slower than the battleship of Soochow.

Liu Hou was disappointed by this speed, and it was only at this time that he realized that he had overlooked an important problem, that is, although the steel battleship and the cement battleship were good, they were both bulky things, and if you wanted to drive such a large thing, it was not enough to rely on the previous wind power and human and animal power, and it was necessary to have mechanical power.

He had never been more eager to build a steam engine. He urgently contacted the Academy's "Institutional Research Institute" to inquire about the progress of their research on the steam engine.

A few years ago, Liu Hou dug Ma Jun from the Wei State, and later set up a research institute specializing in mechanical studies (i.e., machinery), allowing them to study machinery such as textile machines.

Ma Jun and Huang Yueying are the main members of this institute, and they are both grandmasters of institutional studies in this era. In recent years, they have produced a lot of results, in addition to horse crossbows, looms, looms, power plants on hot air balloons, power plants on battleships, and all kinds of processing equipment, they have also begun to work on steam engines.

Liu Hou asked this question to know that they had really built several steam drive devices, but because they could not solve the problem of air leakage, the efficiency of these devices was still relatively low and could not be applied to practice.

Liu Hou was very disappointed in this, but there was no good way, he knew that he had to use rubber to solve the problem of air leakage, but where to find rubber now? Rubber trees seem to be native to the Americas, right?

It seems that they can only find a way to find a substitute, it is said that in addition to rubber trees, there are many trees that also secrete resin, but the resin of other trees may not produce so much, or it may not be so easy to use, but in any case, it can be tried.

Liu Hou wrote a letter, providing his own ideas for Ma Jun, Huang Yueying and others to refer to, asking them to find some resin, add acid or sulfur for reaction, and see if they can make suitable rubber.

There is only so much he can help, after all, he is not so familiar with rubber, and as for whether he succeeds or not, he can only rely on luck. However, whether it succeeds or not, the steam engine that can be used as power cannot be made in a short time, and now we can only think of other ways to deal with the current situation first.

The solution is nothing more than two ways, one is to increase the power, and the other is to reduce the weight. There are not many ways to increase the power, at most to increase the area of the sail, but it is impossible to increase it indefinitely, after all, there are many things to consider such as the balance of the hull.

All that remains is to reduce the weight, the hull has been cast, and there is no way to think about it, so you can only use your brains on the ship's objects. In order to reduce the weight, Liu Hou finally decided to replace the fire ~ guns on both sides with rocket launchers.

Compared with the weight of hundreds of kilograms of guns and artillery mounts, the weight of the 90 guns was reduced by more than a little bit by replacing them with rocket launchers, and the weight of the ninety guns was reduced, and the weight was replaced with a light and fluttering iron cylinder, and the weight was suddenly greatly reduced, which increased the speed of the ship by one or two percent, but it was still slightly slower than the large warships of Soochow.

Although it is still unsatisfactory, it is not unacceptable, after all, the positioning of this cement ship is a strong firepower output and invincible defense capability, and it should be slower.

However, rocket artillery also has a weakness, that is, the accuracy is too poor, and most of the time it can only do covering strikes. Therefore, the two heavy guns in the bow and stern of the ship, Liu Hou, still retained, and used them when he needed a precise strike, and used the rocket launchers on the side if he needed a covering strike.