Seeing Xia Yu suddenly pick up the big wrench and smash it on the pipe to make a loud noise, Ye Zi laughed softly, she still clearly knows what the surrounding environment is like, but she doesn't feel nervous anymore, but has a feeling of sleepiness.

It's not that he wants to sleep, but he doesn't have much energy, Xia Yu knows Ye Zi's current situation, and he starts to think slowly because of lack of oxygen, this is not a sudden situation, but an anoxic environment that makes people lose their judgment unconsciously, the most representative of which is the air crash that occurred on a passenger plane.

It was in August 2005, half an hour after the departure of a Boeing 737 with 115 passengers and 6 crew members on board of Helios Airlines, air traffic control could not contact the plane, considering the possibility that it might be similar to the 911 terrorist attack, the Greek army sent F16 fighter jets to the air to monitor the Boeing 737, but soon, the pilot of the F16 noticed a very strange scene on the plane: all the passengers were motionless as if they were asleep, He sat quietly in his seat with his head bowed.

This made the pilot of the F16 very surprised, when flying near the cockpit, the pilot of the F16 found that the co-pilot was lying on the dashboard without any response, and was driving without a trace, and there was another person who seemed to be controlling the plane, but the behavior was slow and weird, for the warnings and instructions given by the F16 pilot, that person seemed to be incomprehensible, and finally, the Boeing 737 ran out of fuel and crashed in the Marathon Mountains northeast of Athens with more than 100 people.

The conclusion reached by the post-investigation was unexpectedly simple, but because when the plane was conducting a cabin pressure check on the ground, the maintenance personnel forgot to turn the pressurization switch from manual mode to automatic mode after doing the pressurization test, so that after the plane took off and rose to high altitude, the pressurization system of the aircraft did not pressurize the cabin, making the air in the cabin thin and the oxygen insufficient, and the pilot and passengers lost consciousness together, and the plane finally crashed because there was no fuel.

Pilots have a lot of time to notice the pressurization brake before the plane crashes, but why didn't the pilots notice it? In addition to the absence of this check on the checklist, the alarm of the air conditioning system attracts the attention of the driver, and there is another important reason, that is, this lack of oxygen is not as sudden as the loss of pressure at high altitude, but a kind of climbing state, slowly depriving people of oxygen.

The cockpit recording also recorded the conversation between the captain and the co-pilot, from the beginning of the clear, accurate to the end of the inexplicable, this is the complete evidence that the co-pilot gradually lost his ability to judge because of lack of oxygen, it is worth mentioning that most of the crew on the passenger plane did not die because of lack of oxygen, they just fell into a deep sleep because of lack of oxygen, and the impact caused by the crash was the cause of their death.

The current leaf situation is similar, although he is still awake, but his reaction is slower, his judgment is reduced, if he ignores it, he will eventually fall into a deep sleep, Xia Yu doesn't know how long he can last, his strong lung capacity allows his lungs to store oxygen far beyond ordinary people, but Xia Yu is not superhuman, if he can't do his best to solve the problem, he will also be like the current leaf, lose the ability to judge the surrounding environment, and finally become confused and fall into a deep sleep.

Outside the hatches on both sides are the combatants of this submarine, Xia Yu doesn't know if he will be shot directly if he rushes out, considering that this submarine is now keeping hidden, there is only one possibility, there are his own ships or submarines nearby, as long as he attracts the attention of his own people, he may be able to hold on until the rescue comes, Xia Yu can only pick up the wrench again and use the most primitive way to attract the attention of the outside world.

"Dang Dang Dang", continuous knocking on the pipe wall, when the loud metal knocking sound through the shell of the nuclear submarine into the seawater, the nuclear submarine control tower, all the people in the control tower of the nuclear submarine were terrified and almost lost their souls.

"Damn, how is that possible?!" The bearded captain exclaimed.

But it was useless, such an obvious sound had been captured by the sonar systems of the 039A and 139 ships, and almost immediately, the two ships turned around and locked the position of the nuclear submarine, while at the same time, more ships were rushing in this direction.

The USS George Washington aircraft carrier group had already arrived in this area, and if there were only a few ships of the search team here, they might be forcibly driven away by the USS George Washington's aircraft carrier group, but when a dozen ships and seven or eight submarines gathered in a small area, and at the same time, the Guangdong aircraft carrier group was also coming, even the George Washington did not dare to venture forward, and the fate of this nuclear submarine was already doomed.

"Sir, what are we going to do?" The first mate looked at the supreme commander of the nuclear submarine in despair, just now, the sonar in the submarine received the Morse code from the 039A submarine asking for surrender, and at the same time, the sonar of the nuclear submarine also heard the sound of the 039A submarine torpedo bay filling water, and everyone knew that they had been locked.

Looking at his subordinates, the bearded captain said bitterly: "We, surrender ......"

Although they already knew that this would be the final result, all the officers and men in the nuclear submarine, including the captain, were bitter and desperate, and there was no room for them to continue to maneuver in this situation, so they could only send Morse code to 039A to indicate surrender.

Surrounded by several submarines and floated to the surface, and then opened the hatch to watch the Chinese soldiers enter their submarines, the bearded captain standing on the deck was expressionless, he knew that his military career was completely over, and even after returning home, he would have to accept a military trial, no matter whether his choice was wrong or not, political parties all over the world were the same, as long as something happened, someone must carry all the black pots, and as the supreme commander of this submarine, the bearded man knew that there was no better scapegoat than himself.

"Bang bang", continuous knocking sound continued to sound, Ye Zi was a little curious, slowly turned his head to look at the place of the sound, lack of oxygen guide zhì she can no longer react immediately, Xia Yu is not, immediately picked up the pistol aimed at the hatch to remain vigilant, afraid that the other party would suddenly open the hatch, but then heard the sound of speech made Xia Yu stunned, because on the opposite side of the hatch, someone actually shouted in Chinese: "Swift, open the door quickly, we are the Chinese Navy." ”

Could it be that the people of the naval forces have already captured this submarine? Xia Yu was overjoyed in his heart, but then he was suspicious and reborn, and it was difficult to ensure that this was not a trick by the Americans, so Xia Yu did not open the hatch, but shouted loudly: "How do I know if you are lying to me." ”

The special operations personnel who stayed outside the door were depressed, but they were able to get a rescue order to come down from the submarine, and many of the people involved in the search outside did not know the specific content of this operation, but they never expected to be suspected by the object they wanted to rescue, and the special operations personnel had to first say Xia Yu's number in the army, and then said: "Now you believe me, right?" ”

Nimadu aimed directly at the target and arrested me, can you still miss my soldier ID number? If I fool you out like this, then I'm not a fool? Xia Yu replied categorically: "I don't believe it." ”