Wang Lizhu practices singing in a park in Heishan county, Northeast China's Liaoning province, Aug 12, 2010. Heishan is one of the cradles of the Chinese cultural heritage 'er ren zhuan,' a song-and-dance duet popular in Northeast China. As a professional performer of 'er ren zhuan,' 45-year-old Wang Lizhu started a tutorial center in 2006 to pass down her skills and entertain people. The essence of Heishan er ren zhuan is pureness, clearness and grace of its sound, she said. [Photo/Xinhua]

Wang Lizhu watches her students’ performances backstage in Heishan county, Northeast China's Liaoning province, Aug 11, 2010. [Photo/Xinhua]