The festively-costumed maiden singers of ethnic Dong's Ka Lau chorus, the big song of their distinguished folk vocal art, join hand with visitors to dance to the intense rhythm and beat of folk dancing, as visitors across the country arrive here to admire this notable intangible cultural heritage of Dong's Ka Lau chorus, at the Gaozeng Township, Congjiang County, southwest China's Guizhou Province, Jan. 29, 2009.