On October 25, 1971, the UN General Assembly passed United Nations Resolution 2758 (XXVI) which stated that the People・s Republic of China is the only legitimate government of China. The resolution replaced the ROC with the PRC as a permanent member of the Security Council in the United Nations.

Resolution on Admitting Peking

Resolution 2758 (XXVI)

THE GENERAL ASSEMBLY.

Recalling the principles of the Charter of the United Nations.

Considering the restoration of the lawful rights of the People's Republic of China is essential both for the protection of the Charter of the United Nations and for the cause that the United Nations must serve under the Charter.

Recognizing that the representatives of the Government of the People's Republic of China are the only lawful representatives of China to the United Nations and that the People's Republic of China is one of the five permanent members of the Security Council.

Decides to restore all its rights to the People's Republic of China and to recognize the representatives of its Government as the only legitimate representatives of China to the United Nations, and to expel forthwith the representatives of Chiang Kai-shek from the place which they unlawfully occupy at the United Nations and in all the organizations related to it.

Source: Facts on File, 1971 p. 825