The sound of gunfire in Guanzhong, at the beginning of the 20th century, although the Manchu Qing Dynasty was already on the verge of collapse, the dragon flag of the Qing Dynasty still fluttered on the city tower of the Shaanxi governor's office (Mancheng). The "Three People's Principles" advocated by Sun Yat-sen gradually took root in people's hearts, and the revolutionary wind also blew into the new army of Shaanxi. Renowned scholar Professor Ling, his daughter Lingyun, and progressives responded to the Tongmenghui's call for "patriotism and road protection", initiating a demonstration parade.