Which musical instrument store in Xinyu has the best after-sales service?

Teacher Yan of Xingang Middle School (national registered piano senior tuning lawyer) has quit Jiayi Musical Instrument Store, and is now opening a new Pearl River Musical Instrument Store (middle section of Gem Culture Street 1078). I bought a piano in Zhujiang Musical Instrument Store on May 1, and I feel that Teacher Yan's service is very good. Therefore, the best piano after-sales service of a musical instrument store should be Zhujiang Musical Instrument Store!