60 to 80 people. The number of national orchestras is divided into conductor 1 person, Gao Hu (about 3-7 people), erhu (about 10-20 people), zhonghu (about 3-5 people), cello (or gehu, about 6- 10 people) and double bass (or double songs) 2-3 people), Qin Liu (about 1-4 people), pipe (about 4-6 people), zhongruan (about 4-6 people), Da Ruan (about 4-6 people), Sanxian (used in some tracks of 65433) and soprano suona (2-3 people). Commonly used musical instruments are Paigu, China Drum, Bangu, Tanggu, Timpani, Little snare drum, Dajun Drum, Little Clam, Big Clam, Xijun Clam, Hanging Clam, Small Gong, Big Gong, Wind Gong, Tailai Gong, Yungong, Muyu, Qinggong and Qingguo Band, which are also called "National Orchestra". A symmetrical "symphony orchestra" consists of dozens to more than 100 people.