The palace belongs to earth; the business belongs to metal; the horn belongs to wood; the sign belongs to fire; and the feather belongs to water.

Gong gōng, Shang shāng, Jiao jué, Zheng zhǐ, and Yu yǔ originated in the Spring and Autumn Period. They are the five basic scales of Chinese ancient music, equivalent to Do (Gong), Re (Shang), and Re (Shang) in Western music. Mi (horn), Sol (levy), La (feather) (no Fa and Si), also known as the five tones.

The five-note roll call of ancient Chinese music cannot be the same as the "Duo, Lai, Mi, Suo, La" of Western music. In the Tang Dynasty, "He, Si, Yi, Chi, Gong" was used; more In ancient times, "gong, shang, jiao (jué), zheng (pronounced zhǐ), and yu" were used.

Extended information:

Compared with the heptatonic scale, the structure of the pentatonic scale has the following characteristics:

(1) There are no minor points between adjacent levels. Second degree relationship;

(2) The distance between two adjacent tone levels is a major second or a minor third;

(3) The distance between the palace sound and the horn sound is a major third .

The confirmation of the palace tones and horn tones plays an important role in determining the pitch of the pentatonic scale (the position of the palace tones): when the five tones are arranged in a fifth-degree relationship, the palace tones and the horn tones are in The two ends of this fifth column form the only major third in the pentatonic scale.

Due to the major third interval relationship between the palace tone and the horn tone, when confirming the position of the palace tone in a certain piece of music, you only need to find the lower tone of the major third, which is the palace tone of this piece of music. This method is called "Gongyin localization".

Baidu Encyclopedia—Gong Shangjiao Zhengyu