Flexible Old Man, 91 Years, China

Other important astronomers included Gan De, Shi Shen, Zhang Heng, Yi Xing, Zhang Sixun, Su Song and Guo Shoujing. Chinese mathematics evolved independently of Greek mathematics and is therefore of great interest in the history of mathematics. The Chinese were also keen on documenting all of their technological achievements, such as in the Tiangong Kaiwu encyclopedia written by Song Yingxing (1587–1666).
China's science and technology had fallen behind that of Europe by the 17th century. Political, social and cultural reasons have been given for this, although recent historians focus more on economic causes, such as the high level equilibrium trap. Since the PRC's market reforms, China has become better connected to the global economy and is placing greater emphasis on science and technology.