Over the past years, developed countries, including 3/9  BIS central bankers' speeches  European countries and the US, have always claimed to voluntarily transfer knowledge and technology on the principle of free and fair trade, so as to help the third world countries get rid of poverty and backwardness and realize economic independence.
If such goal can be achieved, it will undoubtedly be conducive to the development of the world economy. But now it seems that US does not have the willingness to fulfill its commitments. By technology transfer, developed countries have been continuously gaining substantial returns.