Among the thousand extras employed for the shoot, many came down with heatstroke, while others suffered from unbearable itching. Before shooting a scene, Zhang would always give a stern pep talk: "Director Woo is very picky about his scenes. Anyone who messes this up is responsible for the whole scene!"
實拍前，張進戰都會來段精神訓話，「吳導對鏡頭要求非常嚴格，等會如果有人『不在狀態中』，那個人就要為鏡頭負責！」