When we were young, most of us learned that the four great inventions were invented by Chinese people when we listened to our parents or when we were in history class. But many people didn't know who put forward this theory. In fact, we have to thank Chiang Kai Shek and a foreigner.
In 1942, during the Stalemate Stage of the Anti Japanese War, the Kuomintang troops were defeated repeatedly, and their morale was low. Chiang Kai Shek was very anxious. He heard that Joseph Needham, a British scholar, was engaged in the history of Chinese science and technology, so he immediately sent someone to send Joseph Needham and his party to Chongqing for on-the-spot investigation and research. Needham put forward in 1943 the four great sayings for the invention of the ancient Chinese 'gunpowder, printing, and' gunpowder '.