About 120,000 Cantonese coolies, all males, entered Cuba under contract for 80 years; most did not marry, but Hung Hui (1975:80) cites there was a frequency of sexual activity between black women and Cantonese coolies. According to Osberg (1965:69) the free Chinese conducted the practice of buying slave women and freeing them expressly for marriage. In the 19th and 20th centuries, Chinese men (Cantonese) engaged in sexual activity with both White and Black Cuban women and from such relations many children were born.