Group 1 - The core point of the article highlights that the film "731" has achieved a box office revenue of 1.067 billion yuan (including pre-sales) as of September 21, surpassing "Mission: Impossible - Fallout" to become the highest-grossing film in September in Chinese cinema history [1] Group 2 - The article indicates that "731" has set a new record for September box office in China, reflecting a significant achievement in the film industry [1]