Erhu skin can be thoroughly dried in a few days.

A week. According to official website of China Musical Instrument Association, it takes a week to remove the mold, cut off the excess skin and put it on the piano, so the erhu skin can be completely dried in a week. Erhu began in the Tang Dynasty, and is called the Western Qin Dynasty, with a history of 1000 years. It is a traditional stringed instrument in China. Erhu, also known as Nanhu and Omzi, is one of the main stringed instruments in China national musical instrument family. Its timbre is almost the same as human voice, and it has a feeling of singing and speaking. Erhu's famous songs include "Two Springs Reflecting the Moon", "Good Night", "Listening to Pine", "Horse Racing" and "The Grapes are Ripe".