<Li> Quo Tai - chi </Li> <Li> Liu Chieh (last) </Li> <P> The Republic of China (ROC) was a charter member of the United Nations and one of five permanent members of the Security Council until 1971 . The ROC joined the United Nations as a founding member on October 24, 1945 . </P> <P> The "Big Four" victors of World War II (Nationalist China, the Soviet Union, the United Kingdom, and the United States) were the founding members of the United Nations that drafted the United Nations Charter in 1944, which was ratified on 26 June 1945 by the representatives of 50 countries . China, in recognition of its long - standing fight against aggression, was accorded the honor of being the first to sign UN Charter . President Franklin Roosevelt had acknowledged China's war effort in World War II and stated his desire to allow China to "play its proper role in maintaining peace and prosperity" in the world . Thus, despite opposition from other leaders, especially Winston Churchill, China became a permanent member of the Security Council from its creation in 1945 . </P>

When did china become permanent member of un