Closeness means good fortune. Closeness is a matter of help and support, of compliance and obedience on the part of those below.
Wang Bi’s commentary defines Bi (Hexagram 8) as the foundational condition of mutual support and hierarchical compliance, linking good fortune directly to fundamentality, perseverance, and constancy within the bond of closeness.
, The Classic of Changes: A New Translation of the I Ching as Interpreted by Wang Bi, 1994thesis