Check the listing for details. Dunhuang Zhongruan String Set, Strings #1-4, Chinese Guitar Mandolin Strings. Condition: New. Listed at 15.00 USD. Sound of China Guzheng Music Promotion Center offers you this: Brand New Dunhuang Zhongruan String Set. This listing is for Daruan string #1-4. All strings used German Roslau music wire, the best strings in the music industry. Sound of China Guzheng Music Promotion Center Chinesezither.NET is formed by a group of guzheng lovers. Our goal is to promote the music of guzheng also known as Chinese zither or gu zheng, and as well as the instrument itself. We work closely with instrument makers and musicians to bring most updated music and instruments. We offer quality and affordable instruments, textbooks, music CD/VCD/DVDs. The price of our products are based on their cost, shipping, custom clearing and minimal mark-up enough to cover our Maintenance cost. There is no excess mark-up. Our goal is to promote the guzheng instrument and music. To us guzheng lovers, the worst thing is to see people blocked away by high price or low quality awful-sounded instruments and music.