Before coming to the moon, Mark didn't know why the place names here have words like sea, ocean, bay, and Ze, such as Storm Ocean, Chenghai, and Mengze.

It wasn't until he actually came to the moon and took a shuttle through the towering peaks on the rim of the crater to look out over the crater's vast central plain, and he understood why it was called the Sea of Tranquility.

The flat crater plains stretch to the edge of the distant horizon, and the white lunar soil undulates with ravine-like black lines, which look down from the shuttle like microwaves on the surface of the sea, yet the tiniest folds of them are taller than the tallest mountains on Earth. Mark remembers the shock he felt when he first approached the surface of the moon, it was a pure and majestic sense of oppression, the most direct human feeling of the natural world. Looking out over the vast crater plains, Mark quickly forgot about his depression, his bad job, and the long service life that followed, and all his worries were now worth mentioning.

There is no water on the moon, people always have the impression that this is a cold and lonely planet, but because there is no atmosphere to protect it, the opposite side of the moon is often in the extreme heat that makes people's blood steam, not like the earth is wrapped in the constantly evolving vitality and emerald green, the moon is always in a dead silence in millions of years, only the occasional meteorite can set off a wave on it.

It is said that the moon is dead and silent but the moon has never really lived, the desolation here is almost eternal, and the so-called vicissitudes of life are nothing more than a fleeting mist at dawn for the moon, and the huge craters on the moon have not changed in any way since their birth.

Is the essence of the sea water? When our ancestors from the interior of Africa saw the sea for the first time after several generations of trekking, the first thought in their minds must not be water, but the worship of eternity and greatness from the heart, which is the true meaning of the sea.

There are also such vast plains on Earth, but we can only glimpse a corner of the vegetation and buildings, and only on the moon can people really feel this shock.

That's why we call these craters seas.

Mark this is the second time to come to the Sea of Tranquility, the first time is when he first arrived on the moon, here at the training base for a month of suitability training, that painful days he still does not want to recall, most of the people who have just arrived on the moon will have serious adverse reactions, including muscle atrophy, osteoporosis and arteriosclerosis, these problems can be alleviated by taking expensive special drugs regularly, but Mark is obviously not the group of people who can afford to take medicine, can only insist on adaptation training, adapt to the environment of the moon with adverse reactions, During that time, he was depressed every day, vomiting and diarrhea, and thought he was going to die at the time, but fortunately he survived in the end.

At present, about 40% of the population of the moon is born on the aborigines of the moon, but they are obviously not enough to maintain the construction and development of the moon, so every year there will be a large number of immigrants from the earth to come here, immigrants to the moon have a very generous preferential policy, in the space elevator has been built in the case of the spacecraft launch cost has been reduced to a very low level, enough to support a large number of people to go to the moon.

Even so, the construction of the moon is still facing a huge population gap, and the earth has to send a large number of laborers to do temporary work there, although they cannot get the qualification of lunar immigrants, but they can get the certificate of participating in the construction of the moon, whether it is looking for a job or evaluating the title, it is very important to take out this thing. Mark also came here for this certificate, just in time for the global wave of unemployment, and he can't find a job anyway, so it's better to come out and fight than to lie at home, and it is said that if he performs well, he can still mix well.

With this mentality, Mark signed up with a few friends to help build the moon, and his best friend Sun Tan was among them, although he did not achieve much after a few years, but he unexpectedly avoided the disaster caused by the mysterious cube.

What's going on on that side of the planet? What if I'm still on it? Mark has been asking himself this question these days, and of course, he can't get an answer.

Fortunately, he now has no time to worry about himself, it is now the fifth day of the appearance of the mysterious cube, the connection with the earth is still in a state of interruption, the martial law order in Minsk has been issued for three days, the situation on the moon has also begun to surge, people who are dissatisfied with the high-pressure policy have begun to resist, but it is not yet a climate, the call for the people to save the earth, and the rejection of the shrinkage policy is getting louder and louder, I don't know how long Minsk can be pressed.

Mark and the rest of the workers were mobilized and were brought together by a government transport team to the Tranquility Sea mine, where they were tasked with collecting large amounts of helium-3 to keep the energy network running.

There are too many big moves by the lunar government recently, whether it is to carry out research on the mysterious cube, mobilize the army to maintain martial law or maintain the daily wear and tear of the lunar fleet, it needs a huge amount of energy support, because the previous development policy of the moon is high-speed development and accelerated construction, so there is not too much energy and materials in reserve, as long as it is enough, it can continue to expand energy production while building cities, but now it is obviously not possible, and the energy problem has been put on the list of urgent matters. Minsk had no choice but to mobilize workers to exploit this tranquil sea mine, which had been closed for many years.

Rows of multi-functional minecarts collecting moon dust are neatly arranged in a phalanx, they are somewhat old, but they are all normal after testing, Mark saw such a big battle for the first time, and couldn't help but exclaim: "Oh my God, how can there be so many minecarts here?" What is this for? ”

"This is the largest helium-3 mine on the moon, dirt buns." A contemptuous female voice came from Mark's ear, "Because of the topography, the helium-3 element brought by the solar wind for thousands of years has converged here from the northern plateau, and finally settled into the lunar soil, and the Tranquility Sea is the largest rich mineral. ”

"Who?" Mark was a little upset when he was scolded for the bun, but when he turned his head, his anger was half gone.

A pair of eyes in the crowd were looking at him with a smile, the owner of the eyes was a girl in the same overalls as him, she was tall and slender, and the fluffy and wide overalls could not hide her good figure, and Mark turned his head to meet her gaze.