The Quarter-Remainder Canon
The Quarter-remainder canon —Sifen li—is the official astronomical canon adopted in 85 AD under the Later Han dynasty (25–220). It stands out due to its exceptional longevity (179 years) and its ability to outlast dynastic changes: after the division of China into three kingdoms, Wei (220–265), Shu (221–263) and Wu (222–280), the two first new dynasties still kept it in force until 236 and 263, respectively, rather than reforming their astronomical canons.
KeywordsMoon Phase Lunar Phasis Winter Solstice Exceptional Longevity Confucian Scholarship
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