 These three arguments are succinctly summarized into the “three meanings of change” (yi you san yi) in Qian Zuodu (Opening up the Regularities of Hexagram Qian) of the Eastern Han (25–220): (1) the multifariousness in change (bianyi), (2) the constancy in change (buyi), and (3) at ease with change (yijian) (Nielson 2003: 301–302, 304–305; R. Smith 2008: 78–79).