Hsui Tai was a non-canonical character who appeared in the film adaptation of Cat Among the Pigeons in Season 11 of ITV's Agatha Christie's Poirot. Hsui Tai was a pupil of Meadowbank. After Miss Springer had been killed by a javelin, Miss Bulstrode found a voodoo doll impaled with needles in Hsui Tai's locker. She told Miss Bulstrode and Poirot that she had found it on a flower bed and was going to report it. Poirot later established that the doll had been made by Miss Blake who disliked Miss Springer.
This entire side plot and the character of Hsui Tai was not part of the original novel
The character of Hsui Tai was played by Katie Leung.