The drum may be the oldest of all the Chinese instruments.They come in a wide variety of sizes and shapes. Not all are used in the orchestra. Some drums are used in opera, others are for ceremonies and the military.
The Yang Qin is the only hammered string instrument in Chinese traditional music. The Yang Qin shares the same origin with the piano but unlike the piano, which has one hammer per string, the Yang Qin uses two hand-held wooden or bamboo hammers to hit the strings.