There are descriptions of the life of blacks at the time. Taiping Guangji（太平广记，978 CE），or Comprehensive Collections of the Taiping Era，contains tales of Kunlun as positive figures. Black Mo Kunlun was born in an unusual way after his mother's dream of an alien monk yet grew up as a brave guard and lived a happy life rewarded by the Emperor. Domestic servant Mole was strong, smart and brave. After his master told him his most important secret (his love for a singing girl), Mole helped him to overcome various difficulties in order to fulfil his wish. Mole became a popular figure afterwards. Zhu Yu's Pingzhou Ketan (萍洲可谈，1119CE），or Tales of Pingzhou，recorded several references to Kunlun as domestic servants and labourers who worked on board ships to caulk leaky seams below the water from outside, as they were expert swimmers. The blacks in the literature were usually described as honest, brave, strong, willing to help others, or with some special skills, reflecting the reality at the time.  
Since Kunlun has the connotation of 'race' and colour, it is necessary to make two points here. Ethnocentrism is a universal phenomenon, an attitude or action of a people who regard themselves as normal, beautiful and clever while looking down upon others without communication, especially in Antiquity. The Romans took others as barbarians and the Greeks regarded themselves as the most civilized. Indians thought they were living at the centre of the world. Africans had prejudices against whites. Ibn Battuta told us the Malian cannibals did not eat whites because the whites were considered not ripe. Winnie Mandela described her grandmother as the first racist in her life, who told her that the whites must be sick with their blue eyes and pale skin.