Science and Technology in China in Tang and Song Dynasties. China's ancient science and technology was in the leading position in the world before the Ming and Qing Dynasties, especially during the Tang and Song Dynasties. The four great inventions, represented by printing, have made great contributions to the social progress in the west, but the development of science and technology has slowed down since modern times. China's ancient science and technology did not play an active role in China, but it played an important role in the west. The fundamental reason lies in the different social environments between China and the West. China has the conditions to produce the four great inventions, but it has not made good use of the social environment of the four great inventions, which is really thought-provoking.

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