Liang Zhihong. The Shenzhen Nine-Nine Chorus is a mass chorus team organized by the Municipal Retired Employees Management Office under the leadership of the Municipal Federation of Trade Unions. It currently has 160 members, all of whom are retirees. The average age is 65 years old, and the oldest is 78 years old. Some of the members only started to be exposed to the choral art after retirement. Many of them did not even have a vocal foundation before, but they have won world recognition with their enthusiasm for the choral art. They have won many awards in national and world-class choral competitions, and they have competed for Shenzhen. Got the honor, the conductor is Liang Zhihong. Liang Zhihong graduated from Sichuan Conservatory of Music (conducting major in the Composition Department) and is a member of the Chinese Musicians Association. He serves as the permanent conductor of the "Nine-Nine Choir" and has led the group to Beijing, Shanghai, Wuxi, Hohhot, Hong Kong, China, Macau, China and other cities to participate in national competitions. and international choral competition, winning gold and silver medals.