対華21カ条要求
On May 4, 1919, students in Beijing gathered at the Tiananmen to protest the Chinese government's weak resistance to Japanese expansion in China. Patriots were outraged at the influence given to Japan in the Twenty-One Demands in 1915, the complicity of Duan Qirui's Beiyang Government, and the betrayal of China in the Treaty of Versailles, wherein Japan was allowed to receive territories in Shandong which had been surrendered by Germany. These demonstrations ignited the nationwide May Fourth Movement and fueled the New Culture Movement which blamed China's diplomatic defeats on social and cultural backwardness.