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Zang Yungtang (1767-1811) had studied in Suzhou in 1793, the centre of Han Learning at that time, and was invited by Ruan Yuan to edit the classical dictionary, Jing ji zhuan gu. In 1800 he was asked again by Ruan Yuan to collate the Thirteen Classics. He stayed on Ruan Yuan's personal staff until 1802. After failing the Metropolitan Examination, he went into business; then joined the personal staff of Yi Bingshou (1754-1815), who was then the Prefect of Yangzhou, in 1804, to write about the topography of Yangzhou. From 1807 onwards, he went back on Ruan Yuan's payroll, compiling Wu Dai shi [History of the Five Dynasties] at the behest of Liu Fengao (1761-1830).
Qian Taxin (1728-1804) came from a scholarly tradition, a grandson and son of noted men of learning. After obtaining his first degree at the age of 17 sui, he became residential tutor in a family with an excellent library which he used extensively. After attaining the jinshi degree in 1754, he remained in Beijing where he became friends with Dai Zhen and Ji Yun (1724-1805) who later became chief editor of the Si ku chuan shu. He directed the Chong shan Academy in Nanjing, and joined Ruan Yuan on the dictionary project in Hangzhou. He was the author of the critical notes on Er shi er shi kao yi [Twenty-two dynastic histories], 100 juan, 1782. Ruan Yuan's subordinate wife, Liu Wenru (1777-1849) was to compile the same for Er shi si shi [Twenty-four dynastic histories].
Chen Shouchi (1777-1834) of Minxian, Fujian had started his career with Zhu Gui. Afterwards he joined the faculty of Gu jing jing she and the Fu Wen Academy. He was recruited to work on Jing fu and Hai tang zhi by Ruan Yuan. At a later date, he served as editor-in-chief of Fujian tong zhi [Provincial gazetteer of Fujian] and Li xian fang zhi [Local gazetteer of the Li District of Jiangsu]. His own essays on the Classics, with several letters from Ruan Yuan, were printed in Zuo hai wen ji [Essays by Chen Shouchi].
Chen Wenxu (1775-1845) of Hangzhou was a “student” of Zhu Gui, who introduced him to Ruan Yuan. Ruan considered Chen one of the foremost poets of the province, and appointed him to his personal staff. He gained expertise in sea transport, salt administration, grain transport and flood control. He helped Ruan Yuan establish a humanitarian social welfare policy, including famine relief. He collected a large number of women students. Both his subordinate wives were acknowledged poets.