Qin is a cook living in Hong Kong. He has connections to the criminal underworld.

Qin has short but messy black hair and long sideburns.

When Hei and Yin arrive in Hong Kong, they go to Qin to make arrangements for their journey. At requested, he spreads the rumor that Yin's being sold, then brings them to meet with Xiao Jie.
Later, he becomes a chef for the Contractors in EPR hideout. When Claude causes Yin to begin to awaken and kill everyone, he hears a baby crying and carries the infant back to the hideout. Later, he returns to Hong Kong where he looks after the baby while continuing his chef duties. uring this time, Hei begins drinking heavily, prompting Qin to scold him for his behaviour.
(Source: Darker than Black Wiki)