Lunar base.

Zhao Yu walked into the control room and spent 1,000 technology points to exchange the production line of the Hall Thruster.

After the upgrade, all newly built nuclear-powered ships can be directly equipped with Hall thrusters.

But the ship that has already been built needs to be rebuilt.

Out of the control room, Zhao Yu told Uncle Da about the transformation.

"Okay, sir, I'll arrange for the ships at the various bases to come back in turn to replace the thrusters......"

Zhao Yu nodded, and then asked, "How many spaceships do we have now?" ”

"About 100,000 of them, most of them are transport ships......"

"How's the first line of defense going?"

"18% has been completed, according to the current mining efficiency of Xiaotian, it will be completed in about 15 days, and the ...... will be built"

"Of the 2 billion Blue Moon Coins you brought back last time, I divided a part of it to expand the production lines of various spaceships......"

Zhao Yu bowed his head and said, "Since the spaceship has been upgraded, can the plan to send the spaceship to other planets be prepared?" ”

"Yes!"

Uncle Da took out the plan, handed it to Zhao Yu, and said: "There are four planets closest to us, Mercury, Venus, Blue Star and Mars......

"Blue Star is the closest to us, with a daily output of about 300 million Blue Moon Coins equivalent to resources......"

"For the rest, based on the current round-trip time, Mercury is 10 days, Venus is 15 days, Mars is 20 days, ......"

"It's too troublesome to send Xiaotian back and forth, my idea is to directly build a resource collection base on these three planets, build a production line for Xiaotian, create Xiaotian without an upper limit, mine mineral resources without an upper limit, and then send a transport ship to transport it back every time you collect a part of the resources......"

There is no one on these three planets, so you don't need to worry as much about mining as you do on the blue star, and you can let go of mining.

Zhao Yu nodded slightly, "What about Jupiter, how long will it take?" ”

"Jupiter is still too far away, and even if the Hall thrusters are installed now, it will take 4 months to make a round trip......"

"The alien fleet is still a month away, I'm afraid, even if we send the spaceship over, before we get there, maybe it will be shot down......"

"Then forget it, these four planets in the early stage are enough, besides, we have a lot of resources on the moon......"

The two briefly discussed the matter of the alien fleet.

But now, there is too little intelligence, and the weapons and defenses that can be used are arranged, and it is useless to think about it.

Zhao Yu remembered Chief Engineer Yang when he was leaving, and asked, "Zhang Tao, how are they?" ”

"Sir, I still have a slight understanding when I observe Zhang Tao's side, but the other 88 people have made no progress......

Uncle Da was a little dazed, "They don't seem to have too many emotional fluctuations, they just eat, drink and have fun every day, they don't fight, and they don't engage in love and love......"

After a pause, he added, "Sir, I wonder if their environment is too closed to have this emotion......

"So, I thought, just let them out and work like Zhang Tao?"

Zhao Yu nodded slightly, and said: "In addition to the employee level, you set up a welfare system, according to the standards of Blue Star, what level to enjoy what things, in addition, pay them a salary every month or something......"

"Sir, what's the salary?"

"Just send blue moon coins...... "Anyway, this thing is printed by yourself, you can as much as you want."

Zhao Yu pondered for a moment, and then said: "If you build a living area that can accommodate 100,000 people, how many resources will it cost?" ”

"A few hundred Blue Moon Coins should be enough......"

"In that case, then you can build a living area that can accommodate 100,000 people......"

"Sir, are you going to establish a country?"

"No!"

Zhao Yu shook his head and said: "The alien fleet will come in a month, I am worried that the Blue Star will be destroyed, or the contact will be cut off, so make some preparations in advance......"

The quickest way for him to get tech points now is to trade with the Bluestar.

If you trade with the Blue Star people who live on the moon, you can also get technology points, so you don't need to be so troublesome.

[Hint: The number of civilized people who trade with the Mystery Merchant must not be less than one million.] 】

As soon as he finished speaking, Zhao Yu got a hint from the system, which made him a little happy, which showed that in the system's opinion, the Blue Star people immigrated to the moon, as long as the population was greater than one million, they could trade with it.

"Uncle Da, the living area has been expanded to accommodate five million people, and all facilities have been built in accordance with Bluestar standards......"

"Five million?" Uncle Da was stunned for a moment, with a population of five million, it could cost less than 10,000 Blue Moon Coins, which was simple.

For Bluestar, the biggest cost of building a city that can accommodate five million people may be the cost of manpower.

But for them, the biggest cost is only resources, and the manpower side is replaced by robots.

There are now too many robots in the base to count, many of which are idle and are used to expand the living quarters.

"How long will it take for the living quarters to be built?"

"Five days should be fine!"

Zhao Yu nodded slightly, the next difficult part is how to ask for someone from Lanxing.

Thinking of this, he tried to say, "If it merges with Blue Star, can it still trigger the mysterious merchant?" ”

[Note: The Mystery Merchant can only be triggered when trading with other civilizations.] 】

Zhao Yu just tried it, but he didn't expect to get the system's prompts in this way.

"Therefore, even if you ask someone from Blue Star to come over, you can't merge in, you can only let them immigrate as Blue Star people......"

"Sir, with so many immigrants coming, what kind of work should be arranged for them?"

Uncle Da was a little big-headed, and explained: "Almost all the work in our base can be done by robots, and Zhang Tao's work is still him......

Suddenly, millions of people came, and if they didn't find something to do, they couldn't release their energy.

Zhao Yu thought about it for a while, what cannot be replaced by machines at present is creative work.

"When you say that, I know who to immigrate......"

"Doctors, nurses, musicians, writers, artists, teachers, ......"

"You can also turn the living area into an entertainment city!"

Zhao Yu thought about it, he faced a bunch of machines every day, if there was an extra place to eat, drink and have fun on the moon, when he was irritable, he could also go over and relax.

"Sir, with such a large-scale immigration, I'm afraid we can't hide our identity as aliens......"

"If you can't hide it, you won't hide it, it was originally a requirement of the Blue Star Federation, what do you say for fear of social turmoil......"

Zhao Yu shook his head, planning to rest for a few days, and when everything here is arranged, he will go to Lanxing again to talk about immigration.