1. Generally, there are a number of tuning lawyers in regular musical instruments. The tuning lawyers provided by such musical instruments are generally people in the tuning industry, and tuning is linked to the warranty of the piano. Therefore, we should believe that the tuning lawyer recommended by the music store will have the possibility of subsequent solution even if there are melody problems.

2. Generally, professionals with the qualification of tuning lawyers should be graduates of conservatories of music and art colleges (namely, musical instrument repair major), because China has not heard of the qualification examination of keyboard musical instrument tuning lawyers at present. So I suggest you consult the tuning lawyer recommended by the music store and ask if you graduated from a professional college. However, we should also be prepared. At present, there are indeed many lawyers who have not graduated from this major, but it cannot be said that these people do not have this ability. In short, I still need to know something about it with the musical instrument store.