Moving line
Definition
A moving line is a position that cast as old yang or old yin. When it moves, that line of the original hexagram flips yin/yang and produces the resulting hexagram. Moving lines are often where timing, key events, and the direction of change are watched.
How to connect to sources
- Mark moving-line positions in the original hexagram (first through top).
- Open the matching line statement. If Qian’s first line moves, see Zhou Yi · Qian · Chu Jiu.
- Then see which line the change lands on in the resulting hexagram; that chapter can be consulted the same way.
- When several lines move together, match each moving line’s text in turn and synthesize by the school you follow—do not pick a single phrase.
Special all-yang / all-yin wording: Yong Jiu, Yong Liu.
And original / resulting / change
For original hexagram, resulting hexagram, and changing lines, see Original, resulting, and changing lines. The moving line is the trigger of “change”; a still hexagram has no resulting hexagram, so focus returns to original structure and the useful spirit.
Boundaries
- Moving-line statements are classical text; six-relative strength and shi/ying generation–control are practice inference—read them side by side; neither replaces the other.
- “Yong Jiu” and “Yong Liu” are special Qian/Kun rules; do not apply them as ordinary six-line labels.