The ferocious beasts destroyed the city, the core of the legendary mecha [Xingtian] was damaged, and the whole base wailed. The good-for-nothing Zhou Qian drew a circuit diagram that no one understood on the holographic screen: "I can make it live in three minutes." Everyone laughed. The next second, Xing Tian rose into the sky, his eyes flashing with god-level codes - what he repaired casually was actually a self-evolving mecha from an ancient civilization! Since then, various forces have been frantically vying for this only maintenance engineer. Zhou Qian, however, set up a junk buying station: "An ancient piece of garbage, one shot at a time." Until one day, ten world-destroying mechas stood up behind him, and the world trembled: "This wasteland maintenance man is going to poke a hole in the sky!"