File:Tuning key for qin (guqin, stringed instrument), China, Han dynasty, 201 BC to 221 AD, gilded bronze - Östasiatiska museet, Stockholm - DSC09663.JPG - Wikipedia
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KOTO 箏Part 2/2 - Where the Koto came from - Guqin古琴- YatgaЯтга-Guzheng古箏-Gayageum가야금-Đàn tranh彈箏- YouTube
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