Yau Nai-hoi
Yau Nai-hoi () is a Hong Kong screenwriter and director. He is best known as a frequent screenwriter for films produced by the independent Hong Kong production company Milkyway Image, notably films directed by Johnnie To and Wai Ka-Fai. Yau often collaborates with fellow Milkyway Image writers Wai Ka-Fai, Szeto Kam-Yuen, Au Kin-Yee and Yip Tin-Shing. His directorial debut arrived with the 2007 film "Eye in the Sky".