After He Jun stopped maintaining photovoltaic cells, the panels were soaked in water every day and failed, and the time of high tide happened to be the best time for the noon sun, which affected the conversion efficiency of photovoltaic cell packs greatly affected by these two reasons.

Fortunately, the photovoltaic cell group originally had enough design redundancy, and there was no other trouble in this place except for natural disasters.

A few days later, the moon tide and the daily tide gradually staggered, from the superposition of the two tides to the submergence of the time, and the water level never reached more than three floors.

During this period, there were hundreds of earthquakes of varying magnitude, but less than five fingers were felt, and the rest were not felt at all, only on the shaking curves written by the detection instruments.

He Jun knows that the frequency of modern earthquakes is also very high, but most of them are not of sufficient magnitude to be perceived. But there have been hundreds of earthquakes in just a few days, and it is not known whether it is the normal pattern of this era, or if the aftershocks after the major earthquakes are particularly frequent.

After the sixth day, the oxygen level in the protection area began to decline slowly, and the compressed oxygen cylinder returned to normal after emergency oxygen supplementation, and no fault was found after the system self-test, and the air purification circulation system was normal.

But as soon as supplemental oxygen is stopped, the oxygen level drops again.

These few people in the building couldn't pick out a person who knew how to do it, and they didn't dare to disassemble the sophisticated electronic equipment indiscriminately, so they could only use oxygen cylinders all the time.

Forty-eight hours later, the oxygen cylinder ran out, He Jun and Lin Kai ran to Building 17, and the oxygen cylinder they retrieved lasted for another 24 hours.

When the oxygen cylinders were used up again, it was already the eleventh day of the crossing.

He Jun originally wanted to use an electrolyzed water device to solve the problem of oxygen supply. However, the failure to repair photovoltaic cells has led to the evil consequence of insufficient power reserves, even if all the electricity is invested in the great cause of electrolysis of water. It doesn't last a couple of hours.

I have the intention to use the white battery as a power source, but I can't plug the white battery into the water electrolysis device.

He Jun looked through the instructions of the water electrolysis device. I was going to try to modify it, but I didn't expect to see in the manual that this thing is an oxygen preparation facility on a nuclear submarine!

The reactor on a nuclear submarine is small, but a military nuclear reactor generates enough electricity to supply the daily consumption of a medium-sized city, and the electricity from photovoltaic cells alone is a drop in the bucket.

He Jun vaguely remembered that the laser could also split water, but after trying it with the laser gun, it didn't have any effect at all, and he didn't know if he remembered it wrong, or the laser of the laser gun didn't have this effect.

To this point. He Jun couldn't think of any other way but to move the sodium peroxide medicine board out and use it.

However, He Jun soon discovered that the consumption rate of the regeneration medicine plate was too fast, and if he continued at this rate, even if Building 13 and Building 17 were emptied, he might not be able to last until he crossed again.

He Jun was very angry about this, if he really returned to the modern era, he would definitely mention traveling through ancient times, and it was impossible to forget the lack of oxygen here. Since he had already mentioned this matter, how could he only prepare such a small regeneration medicine plate?

Is it that no one knows about the information in a state of secrecy, or is it that it is well known about it, but it is deliberately ignored in order to maintain the original appearance of history?

Whatever the reason, it has come to this point. You have to find a way to hold on until the crossing comes!

In order to save as much as possible, He Jun gathered everyone in the restaurant, and moved all the regeneration pills and enough food and drinking water for a week into the restaurant. Then close the restaurant and let everyone lie down as much as possible to stay relaxed. Oxygen consumption is reduced by reducing the use of regenerative medicine plates by reducing the use of regenerative medicine plates.

The approach is a bit negative, though. The effect is obvious.

In fact, there is also a life support system on the all-terrain vehicle, if the all-terrain vehicle can be brought into the protection area, or this system can be removed, the oxygen supply problem can also be solved.

It's just that the all-terrain vehicle can't drive into the protection area, and no one can dismantle the equipment intact.

After persisting like this for a few more days, when the sun was about to rise on the fourteenth day, there was only a box of regeneration medicine plates left in He Jun's hand.

Everyone's eyes looked at He Jun together, some were full of anticipation, some were flickering, and they were thinking about Xiao Jiujiu in their hearts.

I don't know if it's an illusion, He Jun suddenly felt that the air was unusually dull.

"Brother He......"

He Jun waved his hand to stop Qiqi from saying more: "I can hold on for a few more hours." ”

"There's only a little time left, what if you don't cross by then?" Feng Fu asked apprehensively.

"Don't worry, I have a way." He Jun's face sank like water.

Although He Jun's tone was very confident, everyone's eyes were full of disbelief.

At this point, I have thought of all the methods I can think of, what other ways can I come up with?

Lin Kai has a way - there are now a total of nine people in the protection zone, as long as half of them are killed, the time of oxygen support can be doubled!

He was born as a bandit, and he could do anything in order to survive, but He Jun Bacheng would not agree to this plan, and he didn't dare to say it after thinking about it for a while.

He Jun stood up with his hands on his knees, his activities were idle for several days, his arms and legs were almost rusty, and after silently calculating in his heart, he said: "Another three hours is fourteen days, exactly 210 hours, we can cross at any time, for the sake of safety, Lin Kai and I will go out for a trip, bring back the protective clothing in several other buildings, and everyone will transfer to the all-terrain vehicle together." ”

He had already thought of this solution, but the space in the all-terrain vehicle was limited, and after stuffing all these people into it, even if he couldn't squeeze in canned sardines, it wouldn't be much better.

Lin Kai frowned: "Can it work?" ”

"There's nothing wrong with it, even if it's standing, it's better than staying here and suffocating, I don't think it will take long for us to wait until the next crossing."

Lin Kai wanted to say that what he was worried about was not the lack of space, but that the system in the car could not supply so many people to breathe, but He Jun didn't give him a chance to explain at all.

"What if I go to a place where there is no oxygen?" Zhou Jian asked worriedly.

"Don't worry, no." He Jun said.

Zhou Jian still refused to give up: "Where did you get your confidence? ”

He Jun pointed to his forehead: "Because I know." ”

"What? Do you know where to travel next time? Feng Fu was shocked.

Everyone's eyes fell on He Jun in unison.

He Jun smiled slightly and didn't speak, just tilted his head at Lin Kai.

How does he know where he'll travel next time? I just know that I won't end up on this damn plane!

But is it necessary to explain this? (To be continued.) )

PS: Kavin, sorry that there is only one shift today, please understand.

I didn't pay back two more last month, and I still owe a chapter to Minyi, plus I owe one more today, a total of four more, I remember it.