"The trapezoidal yangqin is a Chinese hammered dulcimer, derived from the Iranian santur. It used to be written with the characters 洋琴, but over time the first character changed to 揚, which means "acclaimed". It is also spelled yang quin or yang ch'in. Hammered dulcimers of various types are now very popular not only in China, but also Eastern Europe, the Middle East, India, Iran, and Pakistan." --WikipediaYangqin string sets are typically composed of steel plain strings and copper wound stings.