Introduction to Sun Yat-sen's Jiangbei Office: On January 1, 1912, Sun Yat-sen was sworn in as the interim president of the Republic of China in Nanjing. Starting from January 11, Sun Yat-sen visited Lion Rock many times and inspected Jiangbei with Huang Xing and others. situation, study the Northern Expedition, and declare war on Yuan Shikai and his domestic and foreign accomplices