What are pentatonic and pentatonic?

Five tones are also called "five tones" It refers to the five tones of China's pentatonic scale: Gong, Shang, Jiao, Zheng and Yu. The interval between two adjacent notes in the pentatonic scale is a sophomore except for the small degree between the angle and the sign, the feather and the palace (a house with an octave high). As Guan Yuan said: "When listening to a feather (yoh) like a horse in the wild, when listening to a palace (kiung) like a cow in the nest, when listening to a merchant (sjang) like a lost sheep, when listening to a corner (kruk) like a pheasant climbing a tree, the sound is clear." Five sounds are equivalent to 1, 2, 3, 5, 6 in the current notation. After the Tang Dynasty, it was called He, Si, B, Chi and Gong. In phonology, five syllables refer to five pronunciation parts of five initials, namely throat sound, tooth sound, tongue sound, tooth sound and lip sound. In ancient music (especially guqin music), the two sounds of 4 and 7 are hopeless to help the landlord.