紫微垣

北斗七星，七政之樞機，陰天樞，天徒，陽之元本運平中天臨制天機，四方所以建四時，均五行，微天權移節度也。一至四爲魁，五至七爲杓，其四曰權，爲時玉開陽、摇光主水，分埜爲吳。又按：揚州屬天權星，荆州屬天衡星。增舊太微垣上台二星，其下星主荆。揚治垣

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Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji