"Ladies and gentlemen, this is the Jiuquan Satellite Launch Center, and the rocket on the launch rack behind me is about to be launched, which is carrying the Shenzhou spacecraft that is about to go to the lunar orbit 380,000 kilometers away to rescue our Chinese astronauts, and now there are still 35 minutes before the launch time, and we can see that there are still staff on the rocket launch pad working nervously......

Today's rocket launch site gathered all the mainstream media around the world, and saving Chinese astronauts has become a major event in the world, especially after the International Space Station has been completely destroyed by space junk, and now the only Chinese astronauts are still active in space.

It has been 13 days since the accident, and within 13 days the launch rocket can be assembled and can be actually launched, which is another Chinese speed that the outside media exclaimed, but only the rocket launch commander on the scene understood how much pressure he was on.

In general, it takes at least two to five years for a rocket to be launched into space from the beginning of the development stage. Even if the development process is excluded, it will take more than 20 days at the shortest, but this time there is only 13 days of preparation time, and even if the entire satellite launch center is preparing for the rocket to be launched day and night, it is still very hasty.

But there is no way to do this, because if this launch window is missed, if you want to launch a rocket to the lunar orbit again, you will have to wait another week, and the crew of Shenlong, who is far away in lunar orbit, will not be able to hold out for that long. Therefore, an order was given from above, and if they didn't do well, they would all be shot.

Although everyone knows that it is impossible to arrest themselves and shoot them, all the people in the management feel the huge pressure on them, and they can only do their best to get this thing done, no excuses, no reason, absolutely no possible failure, and must take everything into their hands. Under such tremendous pressure, we made every effort to catch up with the schedule, and finally completed the rocket before the launch window arrived.

Rocket launch window is a technical term, refers to a suitable launch vehicle launch time range, the size of this range is also called the width of the launch window, the so-called window width is determined by the length of time. The long one is calculated by year, the short one is only a dozen seconds, and the shortest one is called the zero window.

It doesn't matter what the window is for launching the rocket itself, but if it is for the purpose of putting a spacecraft into orbit, due to the different tasks undertaken by various spacecraft, there is a natural limit on the time of rocket launch.

For example, when Tiangong-1 was launched, in order to complete the docking, the timing of the rocket launch was accurate to 1 second, which is called zero window. Because once it is advanced or delayed, even if it exceeds one second, it will be difficult for the launched Shenzhou-8 spacecraft to complete the docking with Tiangong-1. Moreover, the rocket launch must pay close attention to the changes in the climate, when the wind is too strong or there are meteorological conditions such as cumulonimbus clouds, for safety, even if the time point that meets the launch standards, the rocket will not be launched, which is why the rocket launch center is selected in the area where the climate conditions are relatively stable.

Today's weather conditions are also very cooperative, the wind is light, the sky is clear, it is really a good weather for launching rockets, and by the last fifteen minutes of preparation, the staff on the launch pad have withdrawn, and everyone has focused their attention on the launch vehicle.

"Rocket ignition one-minute countdown." In the command center, all the people are engrossed, Yuan Limin is still in the command area, he rarely appears in the flight control center, but in the past half a month, he will run here almost every day to contact Xia Yu and others, as long as there is a contact interruption, he feels very uneasy, even if the Shenlong orbits the far side of the moon, this planned contact interruption, he also feels that he must wait to establish a connection again, confirm that the Shenlong is safe and sound.

This tense mental state for more than ten days in a row has actually exhausted him, Cao Yanhua sometimes can't even stand it, and orders the medical staff to forcibly take him away, but he will always return to the flight control center again soon after, sitting motionless in his position and paying attention to the information of Tiangong-1 and Shenlong at any time, but today, his eyes turned to the rocket launch frame of the Jiuquan Satellite Launch Center.

At this time, the Long March 3B enhanced strap-on launch vehicle is fully ready, and it will send the Shenzhou spacecraft with a total weight of 7,810 kilograms to low earth orbit, and then the Shenzhou spacecraft will leave the Earth's orbit and go to the moon under the control of a computer, where it will enter the same lunar orbit as Shenlong.

In order to ensure that there is enough fuel to return to Earth, this latest model of the Shenzhou spacecraft has increased the fuel reserve, so that the landing module cannot be modified, and it can only carry three people. Therefore, Xia Yu and the others must control the synchronous speed of the Shenlong and the Shenzhou spacecraft in orbit, and then use spacewalks to enter the Shenzhou spacecraft, which invisibly increases a lot of difficulty.

"Ten second countdown, 10, 9, 8...... 3, 2, 1, ignition! At the Jiuquan Satellite Center, the operator of the rocket launch control station accurately and forcefully pressed the red ignition button on the operation console in the final reading sound.

The nozzle of the Long March 3B rocket, which was tied to four booster rockets, spewed out an orange-red flame of nearly 4,000 degrees, and hundreds of tons of water stored in the diversion tank were directly turned into churning gas by this huge flame, and the huge roar of the rocket lifted off resounded in a radius of dozens of kilometers.

This qiē, Xia Yu and the others, who were still circling in the orbit of the moon, were completely unaware of it, and they were still running on the far side of the moon at the moment. It's Xia Yu's duty time, Wang Pengyu is going to the toilet, and Wu Degao is sleeping soundly.

Life in space is actually very inconvenient, although you don't have to divide up and down, left and right, there is no difference between sleeping vertically and horizontally or even diagonally, but you have to fix yourself, and it is best to put your hands in the sleeping bag, otherwise your hands will float like this, but you don't feel it at all. The situation of being startled by his own hand after waking up has already been experienced by Russian cosmonauts, and Wang Pengyu has also experienced it.

"Every time I go to the toilet, I have a strange feeling." Wang Pengyu floated into the cockpit, because there was a possibility of a long-term mission, so there was a toilet on the Shenlong, and it was the kind of toilet specially designed for use in space.

"Come on, I think it's even more strange that I have to keep the food in my stomach even though I have eaten it." Xia Yu replied casually, his attention was all on the surface of the moon at the moment, because the starry sky had just told him that the wreckage of the Ilren spaceship was under a valley on the far side of the moon.