can be produced from two fine metal strings less than 2 mm apart, without any frets or fingerboards. Well-known solo pieces for the erhu includes Sanmen Gorge Capriccio (三門峽暢想曲), Guang Ming Xing (光明行) as well as Lan Hua Hua (蘭花花）.Banhu may sometimes be singularly used in the huqin section if a strong piccolo voice is needed. Cello and double bass (低音) The cello and double bass can also be considered part of this section. This is true in some orchestras, but in others the cello and bass are considered distinct from the bowed strings. Some Chinese orchestras still use the gehu and diyingehu (bass gehu), but due to the limitations and the costs of the instruments, they are now quite rare. A notable example of an ensemble still utilising the gehu and diyingehu is the Hong Kong Chinese Orchestra. In some Chinese orchestras in China, they used an instrument called laruan, which has the shape of a ruan but is larger in size and is played by either plucking or using a bow similar to a cello or bass bow. Woodwinds (管樂) The woodwinds section of the modern Chinese orchestra consists of the bangdi (梆笛), qudi (曲笛), gaoyinsheng (soprano sheng; 高音笙), zhongyinsheng (alto sheng; 中音笙), diyinsheng (bass sheng; 低音笙), gaoyinsuona (soprano suona; 高音嗩吶), zhongyinsuona (alto suona; 中音嗩吶), and diyinsuona (bass suona; 低音嗩吶). Some pieces are also scored for the xindi (新笛), dadi (大笛), koudi (口笛), bawu (巴烏), xiao (蕭), hailuo (海螺), cizhongyinsuona (tenor suona; 次中音嗩吶), gaoyinguan (soprano guan; 高音管), zhongyinguan (alto guan; 中音管), diyinguan (bass guan; 低音管), or xun (塤). Dizi (笛子) The main types of dizis frequently used in the wind section are the bangdi (梆笛), the qudi (曲笛), and occasionally the xindi (新笛). The bangdi is shorter in length and smaller in diameter and produces a clear and bright tone. It is frequently used in bangzi opera of Northern and southern China, hence the name bangdi. The longer and thicker qudi produces a richer and mellower tone. The bangdi is usually a fourth higher in pitch than the qudi. The xindi is longer and thicker than the qudi, with extra finger holes and no membrance. It is even lower in pitch and mellower in tone than the qudi. The dadi (or diyindi) may be used as substitution for the xindi, this instrument has a membrane and sounds like a low qudi. Sheng (笙) The sheng is a Chinese