 Chinese migrants established schools in Seoul in 1910, Busan in 1912, Sinuiju in 1915, Nampho in 1919, and Wonsan in 1923.The number of Chinese in Korea would expand to 82,661 by 1942, but contracted sharply to 12,648 by 1945 due to economic hardships faced during World War II.Prior to and during the Korean War, many Chinese residing in the northern half of the Korean peninsula migrated to the southern half.