音准稳定性采用新的设计方法，六根加大背柱的设计求背桂与钢板的均衡强度，增加背柱抗压能力，实现更好的声音品质和弹奏性能。

Pitch stability is adapting the new design method, six to increase the back column design to find the balance between the strength of back column and steel plate, to increase the back column compression capacity which achieves better sound quality and playing performance.