To study the auspicious days choosing board unearthed from the tomb of Marquis Ruyin of the Western Han period and "God Taiyi's occupying the central zone" recorded in the chapter "Nine Zones and Eight Winds" of the book Lingshu《灵枢》,the present paper makes a comparative examination based on the phenomenon of "吏" occurring as the central zone.The author corrects two previous mistakes and proposes the new idea that the character "吏" is a substitute of the central zone because it occurs between "three," "four" and the center of the circle,closing to the central zone that is marked with the number "five." Then he explicates the arranging order of "吏," "招摇" and "也" on the heaven board and the relationship of these characters.Furthermore,he expounds the existence of two traces of God Taiyi's moving in the nine zones,which are different from each other in the positioning of ten-day and nine-day zones.
