The "seven strings" in the poem refers to the guqin. Because it is composed of seven strings, it is also called "lyre", or lyre, Qin Yu, etc. , belonging to our national plucked instruments. In modern times, it is called "Guqin" because it is different from western musical instruments. Guqin is usually a solo, or an ensemble of harp and flute.
Guqin is one of the oldest musical instruments in China. It is said that it was invented by Fu in ancient times. But at the very least, guqin appeared no later than the Yao and Shun era. During the Spring and Autumn Period, it has been widely circulated. There is a poem "My Fair Lady, Friends of the Hare" in The Book of Songs Nan Zhou Guanluo. The word "Qin" in the poem refers to the guqin. Boya played the piano, met his bosom friend Zhong Ziqi, and became friends. Boya can also play guqin. Confucius "fasted Cai Chen and played string songs for seven days", and also played guqin.
Ancient literati called Qin, Qi, calligraphy and painting the "four arts" of self-cultivation. Because of its quiet and elegant voice, it is still loved by the world and widely circulated.