The U.S. (1865) and Britain (1833) abolished slavery before China did.
> Slavery in China has taken various forms throughout history. Slavery was abolished as a legally recognized institution, including in a 1909 law fully enacted in 1910, although the practice continued until at least 1949. Illegal acts of forced labor and sexual slavery in China continue to occur in the twenty-first century, but those found guilty of such crimes are punished harshly.