Beijing, December 18 (Youth.cn) - A singing competition of Dong songs was held in Congjiang County, Guizhou Province on December 16th. These days, in the Luanli Scenery Garden, an interesting Dong songs singing competition was held. Over 4200 singers from 198 teams of different places in Guizhou Province joined the competition. The unaccompanied polyphonic Dong chorus is a unique folk chorus form. It was promulgated as an item on the Representative List of the Intangible Cultural Heritage of Humanity by UNESCO in 2009. The singing competition has surely injected new vitality to the transmission and development of the traditional culture. Photo/VCG