(Yan Shao: There was a mistake in the previous chapter. The protagonists were not using nuclear submarines, but Ming-class submarines, and one of them was not changed back.)

Four hundred and seventy-eight hours after entering the deep sea, the entire test submarine entered an electronic silent state, cut off all contact with the base, and began to test silent submarine.

The solemn atmosphere in the entire submarine gradually relaxed. Just look at the experts from the Chinese Academy of Sciences and professors from the National Defense University have time to come out of the special laboratory to have a cordial conversation with the soldiers. Captain Sun Jing already had a smile on his face, and everyone understood that the most dangerous mission had been over.

Silent snorkeling is no longer a dangerous task for the officers and soldiers in the submarine who have received rigorous training and rich experience in sailing. What they have to do now is to assist experts' assistants and collect various data.

The submarine sneaked quietly one hundred meters below the sea. Sun Jing nodded with satisfaction. Although he didn't know what kind of technical upgrades and modifications this test submarine had undergone, it was obvious that this test submarine effectively reduced shock waves and noise while keeping the propeller producing friction propulsion in the seawater. If this technology can be popularized in the naval forces on a large scale, the Chinese "Ming-class" submarine could take off the title of "ocean echo" which is innocuous and even represents the price of death!

"Report," a wheeler reported to Captain Sun Jing: "The battery power of our boat has reached the cordon status, and it is necessary to flush the power immediately!"

Sun Jing glanced at the watch and ordered: "Float up at medium speed!"

According to the procedure, charging is to start the diesel generator in the submarine. This generator requires a lot of oxygen to be burned when starting, so the submarine needs to float to the sea surface and extend the periscope and air intake valve above the podium to the sea surface to suck in air.

The test submarine slowly floated up, and at a height of fifteen meters away from the sea, the submarine's periscope and air intake valve rose at the same time. The diesel generator set in the submarine began to work in a rumble, swallowing a lot of oxygen in the submersible compartment, and simultaneously continuously transporting the power source to the submarine battery pack.

Sun Jing reached out and tapped the podium gently. To be honest, he really liked this test aircraft model modified based on the "Ming-class" submarine. This submarine has made creative improvements to the problems of the submarine charging time that is too long and easily exposed to the target affecting assault missions. It saves at least 30% of the charging time than ordinary "Ming-class" submarines. You should know that on the real battlefield, this 30% of the charging time can often determine the victory or defeat of a submarine or even a battle!

Although China already has nuclear submarines, according to Sun Jing's prediction, the Chinese Navy still needs conventional powered submarines as the main force of the submarine force for a considerable period of time, and improving the combat effectiveness of conventional submarines is the most concerned issue for these submarine captains.

"I can finally bring back a lot of my brothers, but... I invite everyone to eat and drink for three days, this... Is it okay to invite them to eat beef noodles every day, and can I drink free noodle soup?"

Captain Sun Jing, who had both the courage of a man and the scoundrel, had already begun to secretly calculate in his heart how to avoid the danger of his wife being completely destroyed. At this moment, a shrill alarm sounded wildly in the command room, and the red signal lights representing the most dangerous in the submarine emitted a flickering blood-red light.

Something happened!

The cold sweat instantly soaked Sun Jing's military uniform. He quickly judged in his heart that the submarine's hull was stable and there was no sign of external force. Now the submarine has floated fifteen meters away from the sea, and it is even less likely to cause fatal problems such as damage to the pressure shell. The diesel generator set is still working, and it sounds normal. The fire signal light is not on, indicating that there is no fire in the submarine...

An operator widened his eyes and shouted: "Report, the air pressure of cabins 1, 2 and 3 is unbalanced. According to the detector, the oxygen content in these five cabins has reached below the risk level!"

Before the operator finished speaking, another operator shouted: "Report, the air pressure of the cabin No. 4 and cabin No. 5 is unbalanced. For some reason, the oxygen in the cabin is being consumed rapidly!"

Sun Jing snatched the communicator microphone and shouted wildly: "Report to me immediately, what happened! Zhan Xiage took your emergency rescue team to Cabin No. 5, and immediately grab the experts in the laboratory back for me!"

Zhan Xia Ge shouted: "Yes!"

But immediately, Zhan Xiage shouted at the other end of the submarine: "Report, I don't know why, the hatch door can't be opened!"

"If you can't open it, you have to open it for me!" Sun Jing's face was as ferocious as a ghost at this moment. He roared wildly: "No matter what method you use, even if you use torpedo to blow up the cabin of the submarine, you have to open the cabin door for me! Now their cabin is almost gone, and they will suffocate and die at any time. They are academicians of the Chinese Academy of Sciences, professors of the National Defense University, and are all treasures of our country. Even if we sell all our dozens of cheap lives, we can't afford to pay!!!"

"Report!"

A operator shouted: "Capital No. 1 has become negative air pressure!"

Sun Jing felt that his legs were weak and he couldn't help but fall to the ground. Once the cabin became negative air pressure, negative pressure would be generated. Even if Zhan Xiage and the emergency rescue team he led were reincarnated by Dali King Kong, he was afraid that the cabin door could not be opened.

"Report," the second operator was silent for a while before whispering: "The oxygen concentration of cabins 1, 2, 3 and 4 is...zero!"

Sun Jing was really stunned. He knew that the national treasure-level experts were dead! He sat there blankly and muttered to himself: "What happened? Why did the oxygen concentration in the cabin drop to zero after only two minutes?!"

The entire command room was silent, and even the sound of the diesel generator was gone. Sun Jing's expression moved, and he jumped up and slapped himself twice. He neighed and said, "I understand, I understand! The air intake valve of our submarine was not opened! Otherwise, the oxygen in the five cabins of our submarine would not be consumed to zero degrees within two minutes, and there would be no negative air pressure in our cabin! I fuck him, we did so many tests, we experienced so many dangers, and we overcame one difficulties after another. Why do we face our superiors immediately when we were about to go home and we were proudly telling them that we had successfully completed the task, but we were all over because of a small intake valve?!"

Tears and snot splashed from Sun Jing's face together. He cried while slapped himself desperately. Amid the loud slap, a thick layer of blood sprinkled on his face. He screamed and said, "Sun Jing, Sun Jing, aren't you fucking awesome? Don't you think you are a very powerful person? Why did you get diarrhea when it comes to critical moments? The oxygen consumption is so fast, isn't it because the diesel generator set is constantly consuming oxygen in the cabin, but the oxygen from the outside is not supplied? Shouldn't you immediately think that it was the intake valve that had a fault? The failure of this mission, so many brothers' lives were ruined by your stupidity, your stupidity!!!"

"Captain, what are you doing?" Zhan Xia Ge, holding an extra-large plier in his hand and his face was covered in sweat and oil, rushed in with Huang Zhipeng. He grabbed Sun Jing and shouted: "Brother, calm down. We have encountered an accident now. If you lose control again, we will be all done!"

"It's over? Yes, it's over, we're over, we're over!" Sun Jing grabbed Zhan Xiage's hand holding pliers and screamed: "If you treat me as your elder brother, you raise the guy in your hand and smash it hard on my head. It's me who's sorry for you, I killed you all!"

Zhan Xiage stared at his eyes and shouted: "What the hell is wrong?"

"Now there are fifty-seven officers and soldiers on our ship, plus those experts and their assistants, a total of seventy people. Now the ones who survived are the people from our command room and the brothers from your emergency support team!" Sun Jing shook the blood and tears on his face and shouted: "I can tell you that now the cabins 1 to 5 have all become negative air pressure, and all our ways out have been blocked, and we can't escape! If we can't wait for support, don't be fifteen meters away from the sea, we will all be suffocated here!"
Chapter completed!