The title of the sixth episode of Song of the Long March is the Long March to let the world know about China. The main content is that the Long March has epic significance in the spiritual home of mankind. This episode introduces Bosat, the first foreigner who told the world about the Long March through words, and shows that Chen Yun, an important leader, introduced the precious documents of the Chinese Red Army's Long March to international producers for the first time. The photos taken by Si Nuo, an American journalist, for Mao Zedong, a security guard in northern Shaanxi, made the image of the Producer Party and the Red Army in China appear in front of the world. George Heidem, an American doctor of medicine, witnessed the Chinese Red Army and became a staunch revolutionary. The glory of the Long March shines on the world, and the Long March lets the world know about China.