Days of Being Wild
On Christmas Eve, Chow meets Lulu from the first film ("Days of Being Wild") whom he remembers from Singapore, although she has no recollection of him. That night, Chow Mo-wan takes Lulu home as she is quite drunk, but accidentally keeps her room key. As he leaves, he notices that her room number is 2046, the same room number that he and Su Li-zhen had during their emotional affair. Upon returning a few days later to return the room key, the landlord informs Chow that the room is not available due to renovations. The landlord offers him the adjacent room 2047. Chow later learns that Lulu was stabbed in the room the night before by a jealous boyfriend.