During the Tang Dynasty (618-907 CE), foreigners came to China as diplomats, traders and workers, and some settled there. The words Sengzhi (僧祇) and Kunlun (昆仑) were used to refer to the blacks. Dynastic histories show that before the ninth century more than ten Sengzhi girls and boys from islands in present-day Indonesia were offered to Chinese Emperors as tributes. Sengzhi seems to be identical to Zanj (Zandj), meaning related to Zanzibar. ${ }^{2}$