Additional info quoted (partly) from http://www.cinespot.com/enewfilms(2become1).html :
Distributor: Media Asia Films (BVI) Ltd.
Producer: Johnnie To
Director: Law Wing Cheong
Based on the novel by: Xixi
Cast: Miriam Yeung, Richie Ren
Screenplay: Ivy Ho
Duration: TBA
Category: TBA
Theatre Line-up: TBA
Release Date: March 2 2006
Synopsis
Based on the critically acclaimed novel by Chinese writer Xixi, 2 BECOME 1 is a woman's odyssey of her fight with breast cancer. The story centers on a regular white-collar woman named BING (Miriam Yeung), who leads a carefree city life that includes guarding her turf in the office and dating and gossiping with her three girlfriends. However, her carefree life soon turns upside down when she found a lump in her breast. Everything begins to fall apart as she tries to cope with the loss of femininity in a series of bittersweet events. With the help of a happy-go-lucky doctor V (Richie Jen) and a shy but talented teenager SING (Justin Lo), Bing begins to find new meanings in her turmoil and the will to face her own demons.