Chen says that during preparations for the film he had seen Old Fish, a movie previously directed by Gao, and felt that Gao had done an excellent job of maintaining dramatic tension.
陳國富說，籌備時正好看到高群書的作品《千鈞一髮》，覺得他把扣人心弦的緊張氣氛營造得很好，手法令人驚艷。