Question: Who was the director of the 2004 Hong Kong martial arts film starring the actress whose nickname is "Dingding"?

Related documents: [0]  [DOC] Throw Down () is a 2004 Hong Kong martial arts film directed by Johnnie To and starring Louis Koo, Aaron Kwok, Cherrie Ying and Tony Leung Ka-fai. Director To dedicated the film, one of his most personal films to date, to the late Japanese filmmaker Akira Kurosawa and drew elements from Kurosawa's debut feature "Sanshiro Sugata". The film premiered at the 61st Venice International Film Festival. [END] 
[1]  [DOC] Ting Man (born 20 June 1983), better known by her stage names Cherrie Ying or Ying Choi-yi, is a Taiwan-born Hong Kong actress. She moved to New York City at a young age, and later to Hong Kong. Her nickname is "Dingding" (丁丁), and she is often credited under the name Cherrie In. [END]  
Answer: Johnnie To
Johnnie To