Question: Who directed the movie that won Best Asian Film at the 21st Hong Kong Film Awards?

Context articles: Father and Son (1981 film)
Hong Kong Film Award for Best Actress
Spirited Away
1st Asian Film Awards
Hong Kong Film Award for Best Asian Film
92 Legendary La Rose Noire
Karena Ng
Hong Kong Film Award for Best Director
21st Hong Kong Film Awards
Blue Gate Crossing

Father and Son (父子情) is a 1981 Hong Kong film directed by Allen Fong.
 It won the Best Film Award at the 1st Hong Kong Film Awards.
The Hong Kong Film Award for Best Actress is an award presented annually at the Hong Kong Film Awards (HKFA).
 It is given to honour an actress who has delivered an outstanding performance in a Hong Kong film.
 The 1st Hong Kong Film Awards ceremony was held in 1982, with no formal nomination procedure established; the award was given to Kara Hui for her role in "My Young Auntie".
 After the first award ceremony, a nomination system was put in place whereby no more than five nominations are made for each category and each entry is selected through two rounds of voting.
 Firstly, prospective nominees are marked with a weight of 50% each from HKFA voters and a hundred professional adjudicators, contributing towards a final score with which the top five nominees advance to the second round of voting.
 The winner is then selected via a scoring process where 55% of the vote comes from 55 professional adjudicators, 25% from representatives of the Hong Kong Performing Artistes Guild and 20% from all other HKFA Executive Committee Members.
Spirited Away (Japanese: 千と千尋の神隠し , Hepburn: Sen to Chihiro no Kamikakushi , "Sen and Chihiro's Spiriting Away") is a 2001 Japanese animated fantasy film written and directed by Hayao Miyazaki and produced by Studio Ghibli.
 The film stars Rumi Hiiragi, Miyu Irino, Mari Natsuki, Takeshi Naito, Yasuko Sawaguchi, Tsunehiko Kamijō, Takehiko Ono, and Bunta Sugawara, and tells the story of Chihiro Ogino (Hiiragi), a sullen ten-year-old girl who, while moving to a new neighborhood, enters the spirit world.
 After her parents are transformed into pigs by the witch Yubaba (Natsuki), Chihiro takes a job working in Yubaba's bathhouse to find a way to free herself and her parents and return to the human world.
The 1st Asian Film Awards were given on 20 March 2007 at the Hong Kong Convention and Exhibition Centre, on the opening night of the 31st Hong Kong International Film Festival.
The Hong Kong Film Award for Best Asian Film is a retired Hong Kong Film Award that was presented from 2003-2011.
 The award has since been replaced by the award for Best Film from Mainland and Taiwan.
92 Legendary La Rose Noire is a 1992 Hong Kong comedy film written and directed by Jeffrey Lau and starring Tony Leung, Maggie Shiu, Teresa Mo, Wong Wan-sze and Fung Bo Bo.
 The film was nominated for eight awards at the 12th Hong Kong Film Awards, where Leung won his second Hong Kong Film Award for Best Actor and Fung won her first Hong Kong Film Award for Best Supporting Actress.
 "92 Legendary La Rose Noire" was ranked number 75 of the Best 100 Chinese Motion Pictures at the 24th Hong Kong Film Awards.
 The film was followed two sequels, one released in 1993 titled "Rose Rose I Love You", where Leung reprises his role but features a new storyline, and another released in 1997 confusingly titled "Black Rose II", also featuring a new storyline and different cast.
Karena Ng is an actress and model from Hong Kong.
 She started off in 2010 in an advertisement for Tempo tissue paper, and started her acting career in 2011 in the Hong Kong comedy "Magic to Win" directed by Wilson Yip.
 She was nominated for the Best New Performer award in the 31st Hong Kong Film Awards.
 More recently, she acted in "Ip Man 3" as a single teacher Miss Wong.
The Hong Kong Film Award for Best Director is an award presented annually at the Hong Kong Film Awards (HKFA).
 It is given to honour the best director of a Hong Kong film.
 The 1st Hong Kong Film Awards ceremony was held in 1982, with no formal nomination procedure established; the award was given to Allen Fong for his direction of "Father and Son."
 After the first award ceremony, a nomination system was put in place whereby no more than five nominations are made for each category and each entry is selected through two rounds of voting.
 Firstly, prospective nominees are marked with a weight of 50% each from HKFA voters and a hundred professional adjudicators, contributing towards a final score with which the top five nominees advance to the second round of voting.
 The winner is then selected via a scoring process where 55% of the vote comes from 55 professional adjudicators, 25% from representatives of the Hong Kong Film Directors' Guild and 20% from all other HKFA Executive Committee Members.
Ceremony for the 21st Hong Kong Film Awards was held on 21 April 2002 in the Hong Kong Cultural Centre and hosted by Eric Tsang, Cecilia Yip, Jacqueline Pang and Cheung Tat-Ming.
 Twenty-three winners in eighteen categories were unveiled.
 The year's biggest winner was "Shaolin Soccer", winning six awards in total.
 Its director and leading actor Stephen Chow clinched Best Director and a long-awaited Best Actor title after being nominated for the award seven times since 1991.
 The 21st Hong Kong Film Awards also saw the establishment of the Best Asian Film category, open to all non-Hong Kong films commercially released in Hong Kong within the previous calendar year.
 The first winner for this category is the Japanese animated feature "Spirited Away".
Blue Gate Crossing () is a 2002 Taiwanese film by writer-director Yee Chin-yen.
 It was nominated for "Best Asian Film" at the 23rd Hong Kong Film Awards held in 2004.