he sad and sonorous sound of the erhu, the musical instrument that epitomizes Chinese music, is weathering an attack from nature lovers who fear its snake skin covered sound box is driving the mighty python into extinction.
Favorably compared to the violin, the erhu is revered in China for its natural sound and has long been viewed as the instrument that best reflects the human voice, most notably a weeping lady.
Countless pieces of music, mostly sad and melancholy, have been written for the long-necked two-stringed instrument, played with a horsehair bow and boasting a more than 1,000 year history.
"The most important part of the erhu is the python skin, the reverberations of the skin give the erhu its unique sound," said Yang Youlin, manager of the Beijing Music Book Store.
"Without the python skin, an erhu is not an erhu. Snake skin, sheep skin, wood, won't do."
Even the cost of an erhu, which range up to 8,000 yuan (US$1,000), depends on what part of the python is used for the sound box membrane, with seasoned erhu players preferring the belly side of the snake near the tail, Yang said.
"A lot of factors go into the sound -- the age of the snake, the size and the uniformity of the scales and the thickness of the skin are all important," Yang said.
The problem is that with China's economy booming, more and more people are buying and learning to play the instrument.
China's opening up to the West has also ensured that an increasing number of overseas fans, especially in Japan and Singapore, are also buying the instrument.
Other instruments, like the sanxian, a three stringed plucked instrument, also uses a python skinned sound box, while python skins have long been used for Chinese drums and tambourines.
The nation's growing demand for python is further stepping up competition internationally where python skins are valued in the usual reptilian fare of purses, wallets, jackets, boots, belts and bags.
"The python has been nearly extinct in China in the wild since the 1980s and much of this is because of the demand for python skins in the music industry," said Xu Hongfa, a wildlife trade expert for TRAFFIC East Asia, a group that monitors the trafficking in endangered species.
"Since then, the wild populations in Southeast Asia have begun to fall and the smuggling of python skins from Southeast Asia into China has grown."
A relish for python meat in southern China, he said, has also played a role in the demise of the snake that thrives in a jungle setting and can grow to up to 6m long.
After ratifying the UN Convention on the International Trade in Endangered Species (CITES), China passed its Law on the Protection of Endangered Species in 1988, effectively making the unlicensed use and trade in pythons illegal, Xu said.
But implementation of the law has not been easy, prompting TRAFFIC East Asia and other environmental groups to work with the State Forestry Administration to set up a certification process between python skin sellers in Southeast Asia and musical instrument factories in China.
New regulations that went into effect on Jan. 1 also require that all erhus have a certificate from the administration, which certify that the erhu python skin is not made with wild pythons, but from farm-raised pythons, he said.
Individuals are now only allowed to take two erhus out of China when travelling, while commercial buyers also need additional export certificates.