Chinese woman (The Blood Line)
From Tardis Wiki, the free Doctor Who reference
A Chinese woman had a shop in Shanghai which Gwen Cooper passed through while tracking the Blessing in 2011. She bribed her with "all the money in the world" for her to open the door to the alley that contained the entrance to the Blessing's site, where the woman claimed there were ghosts. She also met Jack Harkness and Oswald Danes when they came along to visit the Blessing. (TV: The Blood Line)
Behind the scenes
The woman was played by Cici Lau.