After years of self-taught experience and repair work at local music stores, I spent several intensive months at a guitar workshop to study guitar craftsmanship systematically. Got a professional guitar technician certificate from probably the best and oldest guitar repair workshop in China - 9River Guitar Workshop.

Some Repair Examples

Emergency repair: used quick-setting adhesive to repair the nut and re-slotted to eliminate buzzing:

Handmade nut:

Replaced multi-contact Pure Tone jack:

Replaced vintage-style tuners; different diameter required re-drilling. Original metal knob:

After replacement:

Re-drilled string posts to improve string alignment:

Cleaned and lubricated ST bridge:

Serviced: replaced LP bridge springs and refined saddle curvature

Serviced and preserved vintage double-lock tremolo bridge:

Jazz guitar electronics repair: rewiring required, time-consuming:

Polished frets to a mirror-smooth finish

High-position fret replacement on acoustic guitar:

In 9River Guitar Workshop Center：

A guitar I made entirely myself

My certificate