The Tang dynasty purchased Western slaves from the Radanite Jews. Tang Chinese soldiers and pirates enslaved Koreans, Turks, Persians, Indonesians, and people from Inner Mongolia, Central Asia, and northern India. The greatest source of slaves came from southern tribes, including Thais and aboriginals from the southern provinces of Fujian, Guangdong, Guangxi, and Guizhou. Malays, Khmers, Indians, and black Africans were also purchased as slaves in the Tang dynasty. Slavery was prevalent until the late 19th century and early 20th century China. All forms of slavery have been illegal in China since 1910.