What does the ancient rhyme of seven strings mean?

The meaning of the seven strings:

The lyre is what we often say, and its seven strings are very representative.

(2) Guqin was invented as a banjo, with five strings representing the five elements of gold, wood, water, fire and earth, and at the same time representing the five sounds of Gong, Shang, Jiao, Ba and Yu; In the Zhou Dynasty, in order to mourn the death of his son Bo Yikao, a string representing the text was added to the banjo. During the cutting week, in order to increase the morale of soldiers, another string was added to represent martial arts, so the banjo was also called Wenwu banjo. Namely: double sign, double feather, palace, quotient, horn, sign, feather, or: quotient, horn, sign, feather, change palace, less quotient, less horn.

(3) Guqin music that is most suitable for the twenty-four solar terms.

(4) Guqin music contains rich emotions and multiple rhythm changes, but the feeling of harmony between man and nature in music is the easiest to understand in the appropriate solar terms. The relationship between guqin music and solar terms is not limited to the correspondence of scenery, but more importantly, the fusion of emotions and the singing of * * * *. The relationship between guqin music and solar terms can be roughly divided into:

Spring-light and fast

Summer air-heavy and fast

The breath of autumn-light and slow

The air in winter-heavy and slow