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Li Wu traveled through the post-apocalyptic wasteland and became a newly appointed teacher. In order not to go hungry every day, Li Wu, who did not know any knowledge, decided to talk about the happy days in his previous life every day and fool the students. Unexpectedly, they actually made various technologies from previous lives! A hundred years later, Li Wu's statue stood on top of the world. Li Wu stared at the world that was almost the same as his previous life. I made up all the knowledge, how can you make all the technology?

Li Yin travels through the parallel world and becomes a college student. He likes to work part-time when he has nothing to do. Until one day, a group of police officers rushed into the school and arrested Li Yin. The interrogation begins. "What are you doing after school?" "You're playing games after school. Is it illegal for Sir to play games?" Sir broke the defense. "You hacked into other people's drones and blew up countless tanks. You said you were playing a game?" "The people you kill in the game are real people." ... "Why are you playing games and ordering others around?" Li Yin spread his hands: Those people are so useless, they don't even know the art of war. A Sir broke the defense again: This is why you taught them Sun Tzu's Art of War, Thirty-Six Strategies. ... Another day, a group of people wearing military uniforms and heavily armed rushed into the campus. The interrogation begins. "How come the gas cans you sold turned into bombs?" Another day. "The drone you made is for logistics, we are interested in it?" Another day. "What, this steel cable is for aircraft carriers?"

The Yang world, the underworld, evil, demons, ghosts, evil gods, indescribable, everything was encountered by Yang Jian. What happened to this world? Can it still get better? The world is hopeless. With the knife in hand, cut out a way out!