Original sentence: Next in importance to its relations with the superpowers — Soviet Union and the United States — during the Cold War were China's relations with the Third World.Sino-Third World relations refers to the general relationship between the People's Republic of China and the Third World, and its history from the Chinese perspective
Edited sentence: Next in importance to its relations with the superpowers — Soviet Union and the United States — during the Cold War were China's relations with the rest of the Third World.Sino-Third World relations refers to the general relationship between the People's Republic of China and the rest of the Third World, and its history from the Chinese perspective