What channel is said to reign over all the yin channels?

The choice indicating that the CV, or Ren channel, reigns over all the yin channels is grounded in the principles of Traditional Chinese Medicine (TCM). The Ren channel is crucial in the network of meridians and is often associated with the concept of nurturing and regulating the yin aspect of the body.

In TCM, each channel has its specific role and balance. The Ren channel is often regarded as a central channel that governs the yin energies, as it is connected to the body's vital substances, including Qi, blood, and essence. It runs along the midline of the body and is considered particularly important for women’s health and reproductive functions.

Yin channels, which often represent nourishing and cooling energies, interact closely with the Ren channel. This channel's role in harmonizing these yin channels makes it pivotal in maintaining a balanced state within the body’s physiology. Therefore, recognizing the CV channel's preeminence over the yin channels helps one understand its therapeutic implications in TCM practices.