“ISVA Strings Professional European Violin Brand” – specializing in violins, violas, cellos, and basses of all grades – acting as an agent for violin accessories of world-renowned brands – all kinds of new European violins, recommended for guqin appreciation – professional violin maintenance and other services – long-term, Rental Service- German GEWA North District Exhibition Center- Top Accord North District Exhibition Center- 100% Brazilian Sumac Violin Bow”