I came across some exhibitors dealing in Erhu cases at the Shanghai music fair. These Erhu cases particularly caught my eye:
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But I'm not too impressed with the interior, which is lined with stiff foam.
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But I'm particularly impressed with this Erhu case though. The exterior is made of those materials that is used to make Cello hardcases:
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The interior is lined with soft and plush cushioning. Rather heavy though.
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But too bad, it's only a prototype and not for sale yet.