Heart, liver, lung and spleen. According to Little Red Book, the guqin in The Wizard of Oz enters the heart, liver, lungs and spleen, which belongs to the five-tone healing method. Palace sound enters the spleen, Shang sound enters the liver, Hui sound enters the heart and feather sound enters the kidney. The Wizard of Oz is a music that combines flute and piano, and it is also a folk music that combines eastern and western musical elements. China's landscape paintings are used to interpret the emotions, dreams and hopes of modern people.