Cleaner No. 7

Traveling to the end of the world, Lin Yuan found himself lying in a pit full of mycelium. As soon as the bugs were removed from his body, a note was stuffed in his pocket: "Go west and you can see the city wall." The city is surrounded by spores, with a breathing matrix hidden underground, and high-level officials are conducting experiments on living people. But he, a third-class citizen and the lowest-level cleaner, had green lines on his palms glowing—— That's a signal from an alien civilization. It said: You are Experimental Subject No. 7. It said: I have been waiting for 400 million years. It says: Help me. Lin Yuan: "I just cleaned the house. Did you find the wrong person?"