1 harp (Arpa in English, Harfe in German) is a large plucked instrument and one of the important instruments of modern orchestras. Harp can be used for solo, ensemble and ensemble, and it is a multifunctional polyphonic instrument. Widely spread in Europe, America and Asia, there are also harp instruments. The harp was called Beni in ancient Egypt, lyre in ancient Greece and Rome, and there is another kind of harp in China.

Pipa is a plucked instrument, known as "the king of plucking" and "the first plucked instrument". Wooden, the speaker is half pear-shaped with four strings on it. Originally made of silk thread, now it is made of steel rope, steel wire and nylon. The neck and panel have "phase" and "product" for determining phonemes. It is an important national musical instrument for solo, accompaniment, ensemble and ensemble. Pipa is a traditional plucked instrument in East Asia, with a history of more than two thousand years.