The title does not lie: Beware, viewer, semi-graphic sex awaits! Yet there's so much more to Ang Lee's Chinese-language follow-up to Brokeback Mountain than the vigorous rutting that drew attention upon its release. In an astounding breakout performance, Tang Wei plays a Chinese World War II student revolutionary who like Ingrid Bergman in Notorious must use her body to get close to an enemy (Leung). While lacking Brokeback's tenderness, Lust, Caution conveys the melancholy of a love that cannot survive. EXTRAS A boilerplate featurette, full of ''Everyone's so talented''-type platitudes. B

