The most attractive factor that lies in this masterpiece of a film is not the beautiful lead actors. It isn't their outstanding acting and sizzling chemistry either.
To me, it is the mis-en-scene of the entire movie. The settings, the lighting, the props... all add to the mood for love between the main characters. A whiff of smoke from Chow's cigarette tells us his state of mind, the ever-changing tight-fitting cheongsams of Lizhen reflects the constraints of decision-making, the ruins of Angkor Wat ties in with the deteriorating relationship of the two leads.
The excellent use of mis-en-scene gives the film just the right amount of feel needed to flesh out the complicated nature of the characters' relationship. The film leaves the audience fruitlessly yearning for more.