On this day, 76 years ago, on January 20, 1949 (December 22, 1948 in the lunar calendar), U.S. President Truman proposed a four-point action plan in his inaugural speech. On January 20, 1949, U.S. President Harry S.Truman (May 8, 1884-December 26, 1972) proposed a four-point action plan for the U.S. global strategy in his inaugural speech, and focused on the fourth point, namely, providing economic and technical assistance to underdeveloped regions in Asia, Africa, and Latin America to achieve the goal of politically controlling these regions. This is the "fourth plan". Also known as the "Development of Backward Areas Plan". (The first three plans are: support for the United Nations, the post-war European economic recovery plan known as the Marshall Plan, and assistance to the free world in resisting aggression.) The plan was targeted at developing countries and was a supplement to the "Marshall Plan" then implemented in Western Europe. The Fourth Plan is the Truman administration's policy of providing development assistance to third world countries and is an important part of the United States 'Cold War strategy in the third world. Its purpose is to help stabilize non-communist regimes and curb the infiltration of communism through economic and technical assistance provided by the United States; It also ensures that these countries achieve economic development and social progress in a "democratic manner"; at the same time, it expands overseas markets and raw material supplies for U.S. domestic productivity to ensure U.S. economic security. On June 24 of the same year, Truman elaborated in detail the concept of the "Fourth Point Plan" in a special message to Congress. According to the "Point Four Plan", the U.S. Congress passed the "Aid to Undeveloped Countries" bill in June 1950. By the end of 1951, the "Point Four Plan" had expanded to 33 countries. From July 1, 1945 to June 30, 1967, more than 30% of the cumulative U.S. foreign economic and military assistance of US$117.2 billion was given to non-communist underdeveloped countries. The series of foreign aid programs created by the "Point Four Plan" have continued to this day and have had a significant and far-reaching impact on the world political and economic landscape.