Introduction: Qin Lang, a middle-aged man of science and technology, a senior engineer of mechanical manufacturing, went out to throw a piece of garbage, unfortunately wearing a Tang Zhenguan. Afraid that His Majesty Li Er would discover his evil talent, he tried hard to hide himself. In order to live comfortably and comfortably, he had to hide himself. Inducing others to invent and create. Trying to hold their thighs in order to eat and wait for death, trying to pass credit. I don’t want to fight against the world, and I don’t want to live in the temple, I just want to spend my life comfortably in the Tang Dynasty...