Doomsday Garbage Sorting System

Li Yichen didn't even think about it when he heard the words, he lowered his head forcefully, and pressed the pusher button in his hand to the end...

Whoosh!
A huge thrust pushed Li Yichen's body to the front exit. At the same time, the beam of light in the trial passage was completely twisted and torn, and the endless darkness completely swallowed the light!
Li Yichen only felt a pain in his calf, and then he crashed into the black hole, and then he came to a familiar world...

The exit of the trial passage was actually in the air, and it was the roof of a very tall building. After rushing out of the passage, Li Yichen's strength remained undiminished. While a group of undead people looked up in shock at the entrance of the passage, he flew towards the outside of the roof at high speed.

"Keep pressing to the end! It's going to explode!"

The sound of the system rang in his ears. Li Yichen didn't know what was going to explode, but at least he knew it was not a good thing. He pressed the button firmly with his hands, without letting go, and adjusted his body forcefully, so that he flew into the air...

"boom!"

Like a nuclear bomb explosion, a round white ball lit up in the trial passage that Li Yichen had just rushed out of, and expanded rapidly. A huge momentum came from behind, making Li Yichen's body instantly unbalanced.

Li Yichen quickly let go of the button in his hand, and immediately, he was hit by that momentum like a ping pong ball, and was thrown diagonally upwards...

"System! The trial channel is gone?"

Looking at the city that was instantly razed to the ground behind him, Li Yichen asked in shock.

"Nonsense! You want to enter the trial passage without asking me? You are looking for death!!"

The system replied angrily.

"What's wrong? Could it be that the explosion in the trial passage was caused by me entering?"

Li Yichen forced himself to stabilize his body, then exchanged for a helicopter, sat in and pulled the helicopter up, and asked in his heart.

"Nonsense! You are already a B-level life, do you know? The undead's trial channel has just been reinforced, and it hasn't recovered yet. You don't have the cooperation of the undead. How can the trial channel withstand the life energy in your body? ?”

The voice of the system was a little annoyed. After all, if Li Yichen hung up, it would disappear completely.

"Damn! Fortunately, I'm lucky!"

After Li Yichen heard this, he was also afraid. Fortunately, the system reminded him in time and he was able to rush out. Otherwise, he would probably have been annihilated along with the trial passage!

wrong!The trial channel is destroyed!How do I go back? ?
Li Yichen suddenly remembered something extremely important to him. Although the trial passage was destroyed, the undead should have withdrawn from the trial early, but what about him?

How did he go back?Looking around, a huge pit appeared in the trial passage, the buildings around the pit were almost destroyed, and the trial passage disappeared without a trace.

Looking at the familiar starry sky and some familiar letter combinations on the buildings below, Li Yichen knew that he had returned to the planet he was familiar with, but this planet was unfamiliar to him.

When he appeared just now, he was at the top of a thousand-meter-high building, and the surrounding buildings were all about the same height. On the planet where Li Yichen came from, there were not so many high-rise buildings!

Therefore, this is the earth, but it is not the earth he is familiar with, and there will be no people he is familiar with here!And the trial passage is destroyed, not only the undead can no longer go to the trial place, he can no longer go back.

"System! This trial channel is destroyed, can I return to the previous world?"

Li Yichen quickly confirmed with the system in his heart.

"Well... if you are lucky, you can survive until the next trial starts, and you might be able to go back!"

The system tried not to make Li Yichen completely despair with its own answer.

"I go!"

Li Yichen's heart sank, just as he guessed, he... seems to be unable to go back!

"Host! Actually, I have a piece of good news!"

The system then said again:

"When you came out of the trial passage just now, I saw a lot of undead around the trial passage, and they were all high-level undead."

"What kind of good news is this?"

Li Yichen was obviously not very interested. If he couldn't go back and he was trapped here, no matter how dead the undead were, what's the point?
"Think about it! If all the high-level undead on this planet die, then you can rule the entire planet here! Isn't this good news?"

The system said quickly.

"I'm the only human being, so what's the use of ruling the planet?"

Li Yichen replied angrily.

"Not necessarily! Although this planet is occupied by undead, but... there may be humans!"

System Road:
"Besides, even if the humans on this planet are extinct, there are a lot of resources! If you collect more and exchange them for a space battleship, there is still a way to return to the previous planet!"

"Huh? That's right!"

Li Yichen suddenly regained his energy. Although this is not the earth he is on, judging from the buildings below, the technology on this planet is very advanced, and there will naturally be no shortage of resources. The undead will not consume any resources. In other words, He does have a chance to go back!

Thinking of this, Li Yichen looked down, and found that among the remaining buildings, there were many figures grazing towards the deep pit blasted by the trial passage. He knew that those must be undead, so he drove the helicopter away the city.

This is the lair of the undead, and there must be many high-level undead. Li Yichen did not expect that the previous explosion would kill all the high-level undead, so it is better to leave now!
First check if there are other survivors around, and also collect supplies. If the trial passage is no longer available, then accumulate supplies, find a way to exchange them for a space battleship, and see if you can return to the planet you were on before.

This planet is far more prosperous than the one where Li Yichen was at the beginning. After leaving this city, he only flew for 10 to [-] minutes before seeing the next city. Although it is dark here, it has no effect on Li Yichen who has eagle eyes.

There are many zombies in the city, and even Li Yichen can see the figures of the undead, and those undead seem to have spotted Li Yichen, and they all looked up at the sky, looking at the helicopter that Li Yichen was driving.

Because of the height, Li Yichen had no way of knowing the level of those undead, and this place is not far from the city where the trial passage is located. It is estimated that there will be many high-level undead, so Li Yichen did not go down, but directly passed through this city...

After another hour of flying, Li Yichen finally found the next city, so he landed the helicopter on top of a building...