九五

Etymology
The first hexagram of the I Ching (䷀) is six solid bars from bottom to top. In I Ching divination, a value of nine corresponds to a solid bar (old yang: i.e. yang changing into yin). In the I Ching commentary for the first hexagram, it notes that a value of nine in the fifth position (the second bar from the top) has the following meaning:

As a result of the symbolism of the wording in the commentary, this term eventually came to be associated with the emperor.

Noun

 * 1)  the emperor