The sound is fuller and the timbre is brighter. The special design of the piano body can increase the aesthetic feeling of the piano and is suitable for large-scale open-air occasions. Pay attention to the visual effect of the stage when playing the piano, so that the whole performance stage is expressive, energetic and infectious. Pipa evolved from straight-necked pipa and curved-necked pipa in history. According to historical records, the straight-necked pipa appeared earlier in China. "Qin Hanzi" in Qin and Han Dynasties is a kind of straight-necked pipa, with a round resonance box with a straight handle (both sides of the resonance box are covered), which was developed from the string pipa at the end of Qin Dynasty. "Ruan" or "Ruan" is a wooden round resonance box with straight handle, with four strings and twelve columns, and the pipa is played vertically by hand. Ruan Xianshan played this instrument in the Jin Dynasty, so it is commensurate with its name, which is today's Ruan. During the Southern and Northern Dynasties, cultural exchanges were conducted with the western regions through the Silk Road, and the music pipa was introduced from Persia to China via today's Xinjiang. Qupipa is pear-shaped, with four strings and four phases (without columns), and it is played horizontally with a pick. It prevailed in the Northern Dynasties and spread to the southern Yangtze River basin in the first half of the 6th century. In the 5th and 6th centuries, with the strengthening of commercial and cultural exchanges between China and western countries, a musical pipa was introduced from Central Asia, which was then called "Hupipa". Its shape is a curved neck, pear-shaped speaker with four columns and four strings, much like Uttar (OUd or Ud) common in Arab countries or Barbat in ancient Persia. Hold the pipa horizontally and play it with a pick. Modern pipa evolved from this kind of music.