Streams, Valleys, Joints, and She: Where Does Qi Actually Meet?

To understand the Eight She, one must first set aside the image that “the channels are simply twelve lines.”

The Mirror Classic of Bian Que says:

The Twelve Channels all network the 365 joints. Where left-right qi and upper-lower positions meet in qi interaction are all She at the great meetings of Ying-Wei streams and valleys.

It then defines:

Streams and valleys are divisions of the interstices, where true qi arises. Smaller meetings among these divisions are streams… larger meetings are valleys…

Whatever future textual collation concludes about numbers such as “354 small streams and twelve great valleys,” the structure of the passage is clear: the channel network contains junctions of different levels.

Channels are routes; streams and valleys are junctions

Using a traffic network only as an aid to understanding:

• channels resemble major routes;
• streams resemble smaller junctions;
• valleys resemble larger junctions;
• joints mark divisions where qi interaction occurs;
• She describes the state-position formed by qi at these junctions.

This analogy does not mean the ancient authors literally regarded channels as roads. It simply makes clear that the Eight She are concerned with network nodes, not only lines.

Why is She related to “great qi”?

The text says:

Between streams and valleys, Ying and Wei proceed; where they meet great qi is the interaction of joints and the measure of She.

Ying and Wei travel internally, while great qi connects the body with respiration and related inputs. She appears in the context of their meeting, so it is not merely a local structure. It is a node-scale of internal-external qi transformation.

This echoes earlier statements that the lung governs breathing and that qi proceeds from Taiyin.

Why does disease also “lodge” here?

A later passage says directly:

She is the place where upright and pathogenic qi meet together.

This matters. Disease is not an abstract label floating inside the body. It results from relations among upright qi, pathogenic qi, and different channel qi at specific junctions.

To know the disease location, then, it is not enough to know the nature of the pathogen. One must know at what qi-interaction position what relation has formed.

From position to state

The Mirror Classic next introduces nine names: Gui, Cang, Sheng, Dong, Zhang, Yu, Zhi, Zhuang, and Qian.

These no longer answer “where?” but “what phase of change is qi undergoing in this She?”

A complete Eight-She description therefore needs two layers:

She provides position; the Nine Qi provide state.

The next article organizes these Nine Qi into a cycle of living qi transformation.