"Wu Renchen (\u5433\u4EFB\u81E3) (c. 1628 \u2013 c. 1689), with courtesy names of Zhiyi (\u5FD7\u4F0A), Erqi (\u723E\u5668) and Zhenghong (\u5F81\u9D3B), and an art name of Tuoyuan (\u8A17\u5712), was a Qing Dynasty historian and mathematician. Originally from Renhe (\u4EC1\u548C; today's Hangzhou, Zhejiang), he gained recognition in the field of historical scholarship and was recommended in 1678 to take the special examination known as boxue hongci (\u535A\u5B78\u9D3B\u8A5E), which he passed in the following year."@en .