Nanjing dimethoate double-row key music center. According to September Education, Nanjing Lego Double-breasted Music Center is an institution focusing on double-breasted music education in Jiangsu Province. Founded in 2009, the organization has made outstanding achievements in the popularization and application of electronic organ, which has promoted the development of electronic organ in Jiangsu Province from scratch. The Chinese Double-row Key Examination is an examination organized by the Chinese Music Association for people of all ages, with scores ranging from 1 to 10 (10 is the highest level), and those who pass the examination can obtain certificates.