Reborn in the Tang Dynasty, Working as a Cow and Horse in Princess Gaoyang's Mansion

An ordinary wage earner died suddenly after working night shifts for three months. He was reborn during the Zhenguan period and worked as a guard at Princess Gaoyang's Mansion. He had no system, no ability to make cement, and no special skills. With his life-threatening spirit, he worked hard to prevent Gaoyang's rebellion, and finally survived in the Tang Dynasty!