河图洛书

The point here is to transit from 河图 to 洛书, 

rotating 天道 forward by 180^o. The flow from 1 to 2 is now at 7 to 6 and a flow along 1,5,9 completes the transition between the two diagram.

On the 洛书 side, rotating 8 in the 地 plane 180^o completes the flow back to 2 and generates the sequence, 2761(5)9438943(5)761 2...et infinitum.  (5) here indicates that the flow crosses the intersection (origin). It is not part of the sequence.  So, 27619438943761 27619438943761 27619438943761... 周而复始。

To infinity!