The original music of westerners is Zhao Lina. The Westerner is a song written by Liu Ge, composed by Shi Yan and sung by Zhao Lina. Westbound is one of the five most famous migration events in China's modern history. In the long history of more than 400 years from the mid-Ming Dynasty to the early Republic of China, countless Shanxi people, Shaanxi people and Hebei people left their homes, which opened up the economic and cultural channel between the hinterland of the Central Plains and the Mongolian grassland and promoted the prosperity and development of the northern region. Xikou, in a narrow sense, refers to the mouth north of the Great Wall, including Shahukou in Shanxi; Fugukou, Shaanxi; Dushikou, Hebei Province, is the intersection of people from northern Shanxi, northern Shaanxi and Hebei Province moving westward. Xikou is a place where Shanxi merchants, Shaanxi merchants, Inner Mongolia and Outer Mongolia pass through customs and trade, so the people who pass through Xikou are mainly from northern Shaanxi, northern Shaanxi and Hebei. Houxikou generally refers to the place where Mongolia engages in agriculture and commodity trade north of the Great Wall, including Shenmukou in northern Shaanxi, Zhangjiakou and Guihuacheng in northern Hebei (now Hohhot).