The Lending Act was passed by the US Congress at the beginning of World War II. Its purpose is to provide war materials to the allies when the United States is not involved in the war, but the prerequisite is that the allies must use their own cargo ships to transport these war materials to avoid possible attacks on American merchant ships. The countries receiving assistance from the lease law include Britain, the Soviet Union, the Republic of China and other 38 countries, with a total value of 50 billion US dollars. As of September 3rd, 1945, US aid to China was US$ 845 million. -Basic knowledge