Su Yongsheng, a folk artist, creates a painting with barks during a fine folk art exhibition at the Gansu Provincial Art Museum in Lanzhou, capital of northwest China's Gansu Province, June 19, 2013. Bark painting uses tree barks and branches as raw materials and takes advantage of the their natural colors and shapes. Su Yongsheng draws inspiration from several art forms such as paper-cutting and sculpture. (Xinhua/Liang Qiang)