Lin Xiaobai, a modern good-for-nothing, died suddenly and was reborn as the son of a good-for-nothing county magistrate who was laughed at by the whole city in the Tang Dynasty. Breaking off the engagement, being bullied, and having a completely destitute family? He just wants to lie down, but the system forces him to build infrastructure. Curved plows, cement roads, gunpowder guns, modern knowledge dimensionality reduction strikes. He wanted to eat and wait for death, but unexpectedly the princess chased him, the emperor secretly learned the technology, and the Tubo knelt down to beg for peace. Lin Xiaobai sighed: "I just want to be a waste, why do you have to force me to be the savior?"