Judgment: for the Yi-sacrifice see Marshall's
excellent book 'The Mandate of Heaven' (page
'books'): "In the Feng-ceremony King Wu requested blessings from heaven".
"Serve" see here
Line 1. 'Affined' or: one's equal lord, related, kindred, congenial, allied. 'Ten days" was the usual period for a divination: for the coming ten-day week.
Line 2. Fa is the personal name of King Wu (see Marshall).
Line 4. 'Barbarian lord', Lord of Yi, border lord or a lord who is one's equal. This line changes to hex.36, which has the same character Yi in its name! This lord Yi was a war-lord, it was important to have him as an ally (see Marshall). Everyone who was not from one's own people was "yi".
Line 5. 'Composition' or rules, clarity, a badge, pattern. According to Rutt it is a jade baton, an emblem of distinction.
Line 6. 'See' is get audience, see face to face.