The United Provinces of China or United China (中华合众国, Zhōnghuá Hézhòngguó) was an independent warlord state created in the Chinese provinces of Sichuan, Guizhou and eastern half of Xikang, It existed between 1920-1929. Annexed by the Second Republic of China during the South Campaign for National Unity. It bordered the Ma and Buffer warlords, South Chinese Republic, Yunnan and Tibet In 1921 the Tripartite Agreement of Friendship, Commerce and Consular Relations was signed by South China, Yunnan and United Provinces of China.