MR Luo Songsen, the board chairman and general manager of Tianjin Huayun Musical Instrument (Group) Co.,Ltd., the MBA of Dukes Univercity,the executive manager of China Musical Instrument Association, the director of China Professional Accordion Committee, the member of political consultative commission of Jinghai county, Tianjin, has headed the company to carefully work on the innovation of the craftship of the of accordion and harmonium and successfully apply of the patents of sound hole board,resonator,bess machine...