The consists of a long vertical stick-like
neck, at the top of which are two big
tuning pegs, and at the bottom is a small resonator body (
sound box) which is covered with
python skin on the front (playing) end. Two strings are attached from the pegs to the base, and a small loop of string (, ) placed around the neck and strings acting as a
nut pulls the strings towards the skin, holding a minute wooden bridge in place. The has some unusual features: • Its characteristic sound is produced through the vibration of the
python skin by bowing. • There is no fingerboard; the player stops the strings by pressing their fingertips onto the strings without the strings touching the neck. • The horse hair bow is never separated from the strings (which were formerly of twisted silk but which today are usually made of metal); it passes between them as opposed to over them (the latter being the case with western bowed
stringed instruments). • Although there are two strings, they are very close to each other and the player's left hand in effect plays as if on one string. The inside string (nearest to player) is generally tuned to D4 and the outside string to A4, a fifth higher. The maximum range of the instrument is three and a half octaves, from D4 up to A7, before a stopping finger reaches the part of the string in contact with the bow hair. The usual playing range is about two and a half octaves. Various dense and heavy hardwoods are used in making the . According to Chinese references the woods include (,
red sandalwood and other woods of the genus
Pterocarpus such as
padauk), (, aged red wood), (, black wood), and (, red wood). Particularly fine are often made from pieces of old furniture. A typical measures from top to bottom, the length of the bow also being 81 cm. The parts of the are: • (),
sound box or resonator body; it is hexagonal (, southern), octagonal (, northern), or, less commonly, round. • (), skin, made from
python. The python skin gives the its characteristic sound. • (),
neck. • (), top or tip of neck, usually a simple curve with a piece of bone or plastic on top, but is sometimes elaborately carved with a
dragon's head. • ().
tuning pegs, traditional wooden, or metal machine gear pegs • (),
nut, made from string, or, less commonly, a metal hook • (), inside or inner string, usually tuned to D4, nearest to player • (), outside or outer string, usually tuned to A4 • (), bridge, made from wood • (), bow, has screw device to vary bow hair tension • (), bow stick, made from
bamboo • (), bow hair, usually white horsehair • (), pad, a piece of sponge, felt, or cloth placed between the strings and skin below the bridge to improve its sound • (), base, a piece of wood attached to the bottom of the to provide a smooth surface on which to rest on the leg Most are mass-produced in factories. The three most esteemed centres of making are
Beijing,
Shanghai, and
Suzhou. In the collectivist period after the establishment of the People's Republic of China, these factories were formed by merging what had been previously private workshops. Although most were machine-made in production lines, the highest quality instruments were handmade by specialist craftsmen. In the 20th century, there have been attempts to standardize and improve the , with the aim of producing a louder and better sounding instrument. One major change was the use of steel strings instead of silk. The move to steel strings was made gradually. By 1950 the thinner A-string had been replaced by a violin E-string with the thicker D-string remaining silk. By 1958 professional players were using purpose made D and A steel strings as standard.
Use of python skin In 1988 China passed its Law on the Protection of Endangered Species after ratifying the UN Convention on the International Trade in Endangered Species (
CITES), making it illegal to use and trade unlicensed pythons. To regulate the use of python skins, China's State Forestry Administration introduced a certification scheme between python skin sellers in
Southeast Asia and musical instrument makers in China. From January 1, 2005, new regulations also require to have a certificate from the State Forestry Administration, which certify that the python skin is not made with wild pythons, but from farm-raised pythons. Individuals are allowed to take up to two out of China when traveling; commercial buyers need additional export certificates. Outside China, manufacturers of can issue their own
CITES licenses with approval by governments of their respective countries. Such exports are legal as they have been made from legal skin sources. Some are made of recycled products. The
Hong Kong Chinese Orchestra began their research for an alternative to python skin in 2005 and has since designed the Eco- series, which substitutes python skin with
PET Polyester Membrane. For this innovation the Hong Kong Chinese Orchestra received the
Ministry of Culture Innovation Award in 2012. == music==