There are the following five types of pentatonic modes:

(1) The mode with Gong tone as the main tone is called "Gong mode".

(2) The mode with Shang as the main tone is called "Shang mode".

(3) The mode with the horn tone as the main tone is called the "angle mode".

(4) The mode with 徴 sound as the main tone is called "徴 mode".

(5) The mode with the feather sound as the main tone is the "feather mode".

In the pentatonic scale, each note can become the tonic, so the pitch position of the tonic must be marked in front of each mode. For example, the palace mode with A as the tonic is called "A palace mode", the angle mode with F as the main tone is called "F angle mode", and the feather mode with D as the main tone is called "D feather mode".

Each of the five tones can be the tonic of the mode, resulting in five modes:

■Gong mode: 1 2 3 5 6 (1)

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■Shang mode: 2 3 5 6 1 (2)

■Jiao mode: 3 5 6 1 2 (3)

■Zheng mode: 5 6 1 2 3 (5)

■Feather mode: 6 1 2 3 5 (6)

Add the key in front of the mode name to form a complete key name. For example, in the Gong mode, 1=C is called "C Gong mode", when 1=D it is called "D Gong mode", when 1=E it is called "E Gong mode"...; another example is Zheng mode, when 5=C it is called "C "Zheng Tiao", when 5=D, it is called "D Zheng Tiao", when 5=E, it is called "E Zheng Tiao"...; other modes can be deduced in the same way.

With the five-tone mode as the core, there are also six-tone mode and seven-tone mode, which are modes composed of six or seven tones. In this case, the original five tones are called "zhengsheng" (or positive tones), and the newly added tones are called "partial tones" (or partial tones). There are four types of partial tones:

Bian Gong: the major second degree below the Gong sound. If 1 is a Gong, Bian Gong is 7; if 4 is Gong, Bian Gong is 3.

The clear angle: the minor second above the angle sound. If 3 is an angle, the clear angle is 4; if 6 is an angle, the clear angle is b7.

Change sign: the minor second degree below the zheng sound. If 5 is the sign, the change sign is #4.

Leap: the major second below the palace sound. If 1 is the palace, leap is b7.

The relationship between the five positive tones and the seven partial tones is:

■1 2 3 (4) (#4) 5 6 (b7) (7)

Gong Shang Jiao Qing Bian Zheng Yu Leong Bian

Jiao Zheng Gong

After these four partial tones were added, a large number of modes were produced, such as: Jia Qing

The seven-tone palace mode of Jiaohe Biangong: ■1 2 3 4 5 6 7 1

The six-tone feather mode of Jiabiangong: 6 7 1 2 3 5 6

The six-tone Zheng mode with Bian Gong: 5 6 7 1 2 3 5

The seven-tone Zheng mode with Qingjiao and leap: 5 6 b 7 1 2 3# 4 5

The seven-tone Zheng mode with Bian Gong and Bian Zheng: 5 6 7 1 2 3# 4 5