Chronicle By kwokyikhoi Period: Jan 1, 1914 to Dec 31, 1914 Mr. Yue daren, the founder of Darentang pharmaceutical Co. Ltd, first set up a Darentang drug store on Tianjin Guyi Street. Mr. Yue daren, the founder of Darentang pharmaceutical Co. Ltd, first set up a Darentang drug store on Tianjin Guyi Street. Period: Feb 10, 1916 to Feb 12, 1916 Tianjin Darentang Medicine Factory was founded on today’s Zhongshan Road. Tianjin Darentang Medicine Factory was founded on today’s Zhongshan Road.