Chinese Annals (Google Books ⧉, Amazon ⧉, Bookshop ⧉)

The Travels of Marco Polo

The Chinese Annals, in De Mailla, state that the Japanese spared 10,000 or 12,000 of the Southern Chinese, whom they retained as slaves. Gaubil says that 30,000 Mongols were put to death, whilst 70,000 Coreans and Chinese were made slaves.