In order to learn submarine construction techniques, the first submarines ordered by Yuben were built in shipyards in the United States, and then disassembled into parts and shipped back to Yuben for assembly. On July 31, 1905, the first submarine was completed and named the "First Submarine" at the Yokosuka Shipyard, and four other submarines of the same type were completed and launched on September 5 and October 1 of the same year. However, after entering service, these five submarines were not used as "submarines", but became surprising "mine boats". Because the 1904 mine-striking incident of the battleships "Hatsuse" and "Yashima" shocked the military, they had the idea of using the submarine's covert surname to lay mines, so after the submarine was put into service, he still classified it as a "mine boat." This alternative use of theatrical surnames did not end until December 1905, when the "First Submarine" finally regained its true identity, citing its unsatisfactory use as a mine boat.

In 1904, when the first submarine was built in the United States, the first submarine of this type began to be imitated in November of the same year, and on April 5, 1906, the first submarines built by the company, the "Sixth Submarine" and the "Seventh Submarine", were completed and put into service. From the point of view of the structure of the boat, the two submarines imitated in this book are the reduced versions of the "first submarine", the tonnage of the "sixth submarine" is only half of that of the "first submarine", and the hull has also become slender, and at the same time, its transmission machinery has been improved, and the power output power has been increased, so that the speed has been slightly increased. Therefore, it is more appropriate for the "Sixth Submarine" to be called the result of the experimental surname, and at the same time, the success of the imitation also has a certain significance for the design and construction of submarines in later generations. Unfortunately, on April 15, 1910, the "Sixth Submarine" sank due to mechanical problems during diving training in Hiroshima Bay, and all 14 crew members, including the captain Captain Sakuma, drowned. The "Seventh Submarine" remained in service until 1920 and was discharged on December 1 of that year.

After the successful construction of the "Sixth Submarine," the Navy Ministry of the People's Republic of China set the next goal on the introduction of large submarines. In 1907, when Admiral Gonbei Yamamoto visited the United Kingdom, after some bargaining, he decided to buy two new British submarines, which were later known as the "C1" type, and the two "C1" submarines were built at the Vickers shipyard in England on August 30, 1907, and completed and commissioned on February 26 and March 9, 1909 respectively, and were named "Wave-1" and "Wave-2". Compared with the "First Submarine" type, the "C1" type submarine has been greatly improved in terms of tonnage, speed and endurance, but due to the small bomb load, it can still only be used for simple coastal patrols rather than long-distance cruises. Three years after the "C1" submarine was in service, the "C1" submarine began to be imitated again, and the difference from the first imitation was that this time it was built by two different shipyards, the Kure Port Shipyard was based on the "C1" type submarine, and the Kawasaki Shipyard was based on the "C1" type submarine. On August 1, 1910, three imitation "C1" submarines began construction at the Navy's Kure Port Shipyard, and after more than a year of construction, the three submarines were completed and put into service on August 21, 1911, 26, 31, respectively, named "Bo-3", "Bo-4" and "Bo-5", and their models were called "C2" submarines. On March 2, 1910, the construction of a submarine began at the Kawasaki Shipyard and was completed and commissioned on September 30, 1912, and the submarine was named "Bo-6" and the model "Kawasaki". First of all, all the parts and components of the "Bo-6" were all produced by the company itself, and secondly, the tonnage of the "Bo-6" exceeded that of the prototype boat, and the "Bo-6" was equipped with a high-power gasoline engine to increase the surface speed.

In 1912, the navy was no longer satisfied with its small-tonnage small submarines, and in order to meet the needs of the modernization of the submarine force, the navy became interested in large-tonnage long-distance submarines. In 1913, the Ministry of the Navy signed a contract with the shipyard under the Schneider Arsenal of France for the construction of two 450-ton "S" class submarines, compared with the previous submarines, the surface displacement of this type of submarine has reached 450 tons, the power of double diesel and twin shafts has reached a speed of 17 knots, and the surface endurance has reached 2050 nautical miles at 10 knots, and the armament has 6 torpedo tubes, loaded with 8 torpedoes and 1 50 mm gun, this type of submarine has truly become a deterrent weapon at sea. Construction of two submarines began on November 20, 1913 and July 15, 1915, respectively. The outbreak of World War I in 1914 interrupted the construction of submarines at the Schneider Arsenal shipyard, and he was forced to bring back an unfinished submarine to the mainland and carry out the remaining unfinished construction at the Kure Port shipyard, while the other unlaunched submarine remained in the shipyard in France. Since it was impossible to order submarines from Europe, he added two deck torpedo tubes on the basis of the "C2" submarine to continue to improve and build the "C3" submarine, and the two "C3" submarines began to be built at the same time as the Kure Port Shipyard on January 8, 1916, the "Bo-7" was completed and put into service on October 31, 1916, and the "Bo-8" was commissioned on February 2, 1917. In this way, during the First World War, Ben owned a total of 14 submarines of the "First Submarine" type, 2 "C1" submarines, 3 "C2" submarines, 2 "C3" submarines, and 1 Kawasaki submarine.

After the war in Europe finally came to an end, a semi-finished "S" class submarine brought back from France was also built and put into service at the Kure Port shipyard, named "Bo-10", and another "S" class submarine that had been shelved in the French shipyard after the start of the war also started construction again, and was named "Bo-9" after it was completed and put into service. After the completion of the "Bo-9", the prototype design has been greatly improved, but its limited tonnage can no longer play a greater role. Later, the new submarine "Lu-11" designed and built by Reading Power was launched into service, so that the "Bo-9" was classified as a third-class submarine for use. While other old submarines are also used for training or conversion to other purposes.

As far as he was concerned, the year 1920 was the beginning when the submarine force of the Navy's submarine force really stepped into the world's advanced level, but what he did not expect at this time was that China, his neighbor whom he had always looked down on, would actually go ahead of him and establish a submarine force that was much stronger than himself. After the war between the two sides, Yue himself was horrified to find that the Chinese not only surpassed themselves in numbers, but also had far more terrible combat effectiveness than they imagined.

Thanks to Yang Shuoming's efforts, the Chinese Navy's submarine force has transformed from a few toy-like pocket submarines to a powerful underwater fleet with 32 large combat submarines. And because of the whimsical ideas that are constantly in the mind of the "high-tech warlord", among these submarines, there are several new submarines with special weapons.

And the "Seahorse" submarine led by Zhao Enbao is a submarine with special weapons and special tasks.

The attack on the large transport ship just now was purely because Zhao Enbao wanted to show the observers the superb combat skills of himself and his subordinate officers and soldiers.

"Maybe when we complete this mission, we won't be able to wait for 'swarm operations'." Zhao Enbao listened to the observer's words and let out a cold sneer.

Listening to Zhao Enbao's words, many of the officers and soldiers around him showed surprise and puzzlement on their faces.

The specific content of this operation is known only to the captain, deputy captain, and observer in this submarine.

"We're almost at our destination, let's start early!" The observer looked around again and handed the periscope to Zhao Enbao.

Zhao Enbao commanded the submarine "Haima" to continue to move forward, and after a period of unobtrusive sailing, the "Haima" finally arrived at the destination of the trip -- Osaka -- after avoiding a large number of mines and anti-lightning nets laid by him.

Osaka is located in the middle of Honshu Island, bordering Osaka Bay, and is distributed in a north-south long strip, which is the key point of the Kansai region. The area ranks second in the country. Osaka has a large population, second only to Tokyo and Kanagawa Prefecture. Osaka has a Seto Inland Sea climate, with abundant precipitation throughout the year, a slightly muggy summer, and a warm winter with little snow. The average annual temperature is 16.5°C.

Osaka is the largest city in Kansai and the economic, trade, and cultural center of Kormoto. Osaka Castle is located on the northeast coast of Osaka Bay in the southwestern part of Honshu Island, and is connected to the Pacific Ocean by the Kintam Strait and Kii Suido to the south, and to the Seto Inland Sea by the Akashi Strait to the west. At the same time, Osaka is a famous historical and cultural city of Yomoto, and because of its proximity to the Seto Inland Sea, Osaka has been the gateway to the ancient capital of Nara and Kyoto since ancient times, and it is also the area where the earliest commerce and trade development of Komoto was established. In ancient times, Osaka was called Naniwa and Namba, and later it was called Osaka. In the early Meiji era, it was renamed Osaka. In ancient times, it was the key point of sea and land transportation. After the construction of Osaka in 1583, commerce began to flourish. The port was opened in 1868 and the railway was opened here in 1874. Osaka has a well-developed canal network and is known as the "water capital". After the establishment of the city in 1889, Osaka's industry developed rapidly. In the 20th century, it was second only to Tokyo in terms of industrial production.

Zhao Enbao carefully observed the surrounding situation through the periscope, at this time he had already found several warships stationed in the harbor, one of which was a large armored cruiser, but now Zhao Enbao did not plan to attack them.

Looking at the dotted lights on the shore in the distance, Zhao Enbao remembered the contents of the heavy rockets in the submarine rocket compartment, and sneered again.

As a survivor of the Battle of Caofeidian, he witnessed the atrocities committed by the Yue army against the local population. At that time, as a navy soldier, he was unable to stand up to protect the suffering people because of his injuries and bare hands!

That experience became a lingering shadow and shame for his life.

Now, the chance to take revenge has finally arrived.

"Determine the depth, the distance." Zhao Enbao retracted his thoughts and ordered in a deep voice.

With his command, under the dark night sky, the submarine "Seahorse" deftly turned its slender body and entered the attack position.

After determining the position of the submarine on the opposite side of the side, Zhao Enbao gave the order to attack, and with the operation of the crew and the sound of hydraulic presses and electric motors, the rocket compartment hidden in the front and rear of the submarine enclosure and between the pressure-resistant hull and the non-pressure-resistant hull on the back of the hull slowly opened. In the cage launch box inside, thick 300-millimeter rockets were exposed.

This is the biggest secret of the "Seahorse" submarine -- the 1920 submarine-launched rocket compartment.

In this kind of submarine rocket compartment, it is equipped with short-range heavy rockets with a caliber of 300 mm, which are launched in a cage and arranged on the back of the hull before and after the submarine enclosure, between the pressure-resistant shell and the non-pressure-resistant shell, and facing the side. Normally sheltered below deck, it is raised to one side by hydraulic and electrical machinery during loading and launching, and a gas vent door is provided on the non-pressure-resistant shell at the other end.

At the time of launch, the submarine will rise to the periscope depth, use the periscope to observe and set the shooting elements, and then launch this heavy rocket at the periscope depth in the way of broadside facing the enemy, this kind of rocket is short and thick, the range can reach about 6 to 10 kilometers, and it can be loaded with a variety of warheads (mainly napalm and biological and chemical warheads), which are used to cover a large area and attack the enemy's coastal cities and ports.

Submarines such as the "Haima" that can launch submarine-borne rockets are not only unique to the Chinese Navy, but also unique in the current era.

And the designer of this weapon is none other than Yang Shuoming, a young border supervisor with the title of "high-tech warlord".

At this moment, at this moment before the launch, Zhao Enbao still couldn't understand how this young man, who had not been in the navy for a long time, came up with such a weapon.

"Ready." The co-captain reported.

After Zhao Enbao finished proofreading and shooting Zhu Yuan again in front of the periscope, he ordered in a deep voice: "Launch!" ”

"Look, Ishii-kun, what's that?"

Chibako Miyamoto, who was shirtless, pointed to the red line that suddenly flashed in the night sky in the distance outside the window, and said to Shiro Ishii, a military doctor who was lying in his arms and gasping.

Shiro Ishii looked in the direction of her finger, and sure enough, he saw the red light that slid across the sky like a meteor, which must have flown from the surface of the sea and landed on the shore in the distance like a parabola.

Shiro Ishii was shocked, he broke free from the embrace of the fifteen-year-old young artist who was holding him, and stood up naked, and came to the window, where he stared at the landing point of the red line, as if waiting for the violent explosion and the rising fire there.

But to his surprise, he waited for a while, but did not see the explosion or the fire.

"What the hell is it?" Miyamoto Chibako asked in surprise behind his back.

"It must have been launched from the sea, I don't know what it was...... Shiro Ishii replied, but his eyes didn't take his eyes off the strange scenery outside the window.

After a few more moments, the red light was gone, and Osaka Castle was still shrouded in peace and quiet, as if nothing had happened.

Somehow, Shiro Ishii felt an uneasy throbbing in his heart, and he instinctively sensed that these strange red lights were most likely the enemy was carrying out sabotage in some unknown way, but there might have been some accident that caused the things they were using to lose their effectiveness.

"It is likely that Chinese spies were engaged in sabotage, but without success." Shiro Ishii turned back to Chibako Miyamoto and lay down, put his hand back into her arms, grabbed one of her soft and creamy pigeon milks, and comforted her, "Don't worry, our patrol will deal with them." ”

Hearing him say this, the fifteen-year-old girl relieved herself and gave him a lovely smile that was flattering. And as his strokes intensified, she let out a sweet and seductive gasp again.

Seeing her reaction, Shiro Ishii's body once again erupted like a beast, and he smirked and pressed her under him.

Shiro Ishii was born on June 25, 1892, and his original home was Chiyoda Village, Yamamu County, Chiba Prefecture, and his family was a large landowner who owned the land around Chiyoda Village. Shiro Ishii has a total of 4 brothers and sisters, he is the second son, and he is the fourth in the family. When he was in elementary and middle school, Shiro Ishii showed a strong memory, but because his surname was arrogant and arrogant, many people in his classmates felt that Shiro Ishii was both reckless and arrogant, and ugly and rude.

In April 1916, Shiro Ishii entered the Faculty of Medicine of Kyoto Imperial University, graduating in December 1920, at the age of 28, determined to become an army doctor in the service of the Empire and the Emperor. So less than a month after graduating from university, he joined the 3rd Guards Infantry Regiment as a midshipman and began military training. On April 9, 1920, Shiro Ishii was appointed lieutenant medic and assigned to the Guards Division, which he had longed for.

On August 1, 1920, Shiro Ishii was transferred to the First Garrison Hospital in Osaka, and in the bustling and lively Osaka Castle, because his family was rich enough for him to spend a lot of money, so he never lacked money to spend. As a result, Shiro Ishii's debauchery was fully revealed, and he soon gained a reputation as a "pervert", a "nocturnal wanderer", and a "drunkard". He worked in the hospital during the day, and spent the night partying in taverns and art halls, and his favorite thing to play with was the art of fifteen or sixteen.

(To be continued)