The story of Chinese immigration to Mexico extends from the late 19th century to the 1930s. By the 1920s, there was a significant population of Chinese nationals, with Mexican wives and Chinese-Mexican children. Most of these were deported in the 1930s to the United States and China with a number being repatriated in the late 1930s and in 1960. Smaller groups returned from the 1930s to the 1980s. The two main Chinese-Mexican communities are in Mexicali and Mexico City but few are of pure Chinese blood.