The snakeskin of Yangju Erhu is a little loose. Is there any way to tighten it a little? Because the snakeskin is loose, it's a little stuffy. Not fragile. That doesn't sound fun.

1, re-skin; 2, dry, fire roast, careful operation; 3. The back of Yangju Erhu is open. It can be made into a stainless steel shelf with smooth edges. Put it into the spool from the back and tighten the skin. This method may be more expensive than changing a piece of leather, but you can apply for a patent, which is a simple and good method.