Erhu Dunhuang Brand Shanghai National Musical Instrument Kokyu Nanhu Stringed Instrument with Hard Case I am unable to provide details regarding maintenance condition, so it will be handed over as is. Please check the condition in the photos. * We have cleaned it as much as possible, but please understand that there may be old scratches, stains, and other oversights that could not be removed. This is a used item, so please consider purchasing only if you understand this.