Yang Chen's method was also simple, let Lily set a big fire to completely cut off the city from the outside world, and then began to clean up the remaining cockroach tribes in the city.

Then began to build walls and defenses to give these tens of thousands of humans a place to stay.

Even they don't need this kind of mega-city with a population of tens of millions, they only need a small part of the city.

Fortunately, there are more young people in these tens of thousands of human beings, and under this condition, it is difficult to say anything about mutual love and affection, and it is okay to make do with it.

The main thing is to have more human beings, and it would be better to wait more people.

These things are not things that Yang Chen and Lily should worry about.

With the help of Lily and Yang Chen, it didn't take long to build the wall, and the two of them could split a mountain in a day and then transport a large number of stones back for casting, which was a simple task for these two people.

The walls are relatively easy to build, but the automatic weapons are a little tricky to set up, but fortunately, there are a lot of weapons stored in the last base of the human race.

Just take it back and use the ready-made one.

It lasted for a month before the flames were extinguished, and Yang Chen and Lily didn't leave in a hurry, but stayed here for a while, after all, they wanted to see if these high walls could really stop those cockroaches.

The cockroach clan's wings have long since degenerated, and although several hands can be used to climb, it is not so easy to face the attack of human weapons.

"There's nothing wrong with defense, so let's develop it yourself."

Yang Chen said: "It is also very difficult for us to completely kill these cockroaches, after all, they are divided in various places, and it is too troublesome for the two of us to find them." ”

"Where can I trouble you?" The leader temporarily elected by the Terrans said: "I have really caused you a lot of trouble, and we don't know how to ...... it."

"Hey, it's all Terran, why do you say these words, this place is our coordinates, if it develops in the future, I hope you can lend a helping hand when we need help."

Yang Chen became very serious at the same time: "You can't show any cosmic race this coordinate, and I have a suggestion, that is, don't contact any cosmic race." ”

"Slow down, don't come into contact with any cosmic race!"

"Our Terrans are too weak and conspicuous in the universe, and many races don't have a good impression of our Terrans."

Yang Chen said very seriously, this matter must be understood by these people.

If one day you casually contact other cosmic races while still developing, these cosmic races may even directly wipe out human beings.

The leader of the Terran clan solemnly ordered the coordinates given to them by Yang Chen, and promised that he would never show them to any race other than the Terrans.

"Of course, we also want to live, you said that we are like rats and everyone shouts and beats, then we will definitely develop in a low-key and stable manner."

"By the way, there's something I have to tell you." The leader of the Terran clan suddenly said: "There is a laboratory under the ground of the destroyed city, which hides our genetically modified maps of these cockroaches, which are of little use to us, but I am afraid they can still be of great value to you." ”

"To be honest, that kind of technology is far beyond what we can grasp now."

Yang Chen was pleasantly surprised: "This is really good news, I will go and get it immediately, thank you so much." ”

Yang Chen didn't expect to be able to harvest such a big surprise.

Although the cockroach clan is very rubbish, even if Yang Chen has developed genetic technology for so long, he has not mastered the slightest rule, and this method is like being sealed.

And now that he has a blueprint of the genetic map in front of him, it is simply a treasure sent from heaven.

It was even happier than when he discovered the treasure left behind by the Terrans.

After all, although those treasures look lofty, they can't be obtained for a while, but they are not as real as the genetic map in front of them.

What Yang Chen is most afraid of now is that more than a dozen nuclear bombs will blow up and destroy the underground laboratory, so he will want to cry without tears.

Yang Chen pulled through the ruins and finally found the entrance to the basement.

Fortunately, the front is clean as usual, and this basement is built extremely deep, even a nuclear bomb can't blow it up.

"Good things, all good things."

Yang Chen came to the laboratory, the laboratory is not big, after all, it only studies the genetic map sequence, and the experimental body is a cockroach, so it is only two hundred squares.

The main thing is that a large number of instruments are furnished, Yang Chen took a look at these machines and instruments, these can be made by himself, don't worry.

According to the Terran leader, there should be a safe with the contents of their research.

Yang Chen pulled the safe open and directly pulled out the wall, and then Yang Chen ran away with the safe, as if he was afraid of being snatched away.

Yang Chen happily trotted all the way back to the city, and even put the safe directly into his spaceship, and then planned to open it.

"Are you that happy?" Lily said: "Running away without saying hello and carrying the spaceship?" ”

The spaceship took off directly and left the planet, and Yang Chen did run away without even saying hello to leave.

Lily said a word, and then hurriedly followed, and those humans also felt helpless about the hurried departure of the two, but sincerely wished the two of them a smooth journey.

Yang Chen and Lily continued to drift in the universe, and at this time, Yang Chen had already opened the safe and recorded all the genetic drawings.

"I hate it! It was too hasty to exterminate those civilizations at the time, how could I not have thought of that! ”

"They must be following the evolutionary mode of the genetic route, even if they have not traveled a long distance, but just this map is enough for us to study for a long time, and there are too many things in it!"

Yang Chen thumped his chest and was annoyed, Lily was too quick to kill all those little things, leaving nothing alive.

"Forget it, didn't you get a consolation prize?" Lily was lying on her big couch eating fruits, and she seemed to be particularly fond of watermelon and durian, so she brought a lot of these fruits with her when she left.

"This consolation prize is also *** consolation!"

After recording all the drawings, Yang Chen still put away the safe, these drawings may be able to stimulate and modify human genes and get more possibilities.

It's just that there is no way to try it for the time being, this experience is not in vain, it is not in vain, it is really a very important harvest.

Led by Yang Chen's box plan, genes are the things that Yang Chen values the most, if it can really let the human genes stimulate their full potential, Yang Chen can't predict how far the human race can reach at that time.

Although this genetic map is relatively simple, it is already equivalent to the key to opening the door to a new world!