When the People's Republic of China was founded in October 1949, Wu was appointed head of the Soviet Union and Eastern Europe Department of the Foreign Ministry and accompanied Mao Zedong on his visit to the Soviet Union in January 1950. In November 1950, Wu attended a United Nations Security Council meeting as the PRC representative. He made a long speech condemning the United States for its "armed aggression" in Taiwan and "armed intervention" in the Korean War, and called for the UN to demand the withdrawal of U.S. forces from both Taiwan and Korea.[1]