A large influx of Chinese came during the American occupation of the Dominican Republic in 1916 to 1924, when ethnic Chinese came over to take part in the rapid economic expansion that resulted from the occupation. In 1937, there was an increased number of Chinese migrants that came to the Dominican Republic due to the Sino-Japanese war. In 1944 an official Chinese office was opened in the Dominican Republic and in 1945 a branch of the Chinese National Party was also opened in the country.