They even rode in a helicopter to get aerial footage of the city. Hou says that to achieve the 3D / 360-degree effects, the production team had to carry 11 cameras and form them into a circle to shoot.
侯孝賢指出，為了達成「3D、360 度」立體環狀的視覺效果，製作團隊每次都得搬出 11 台攝影機、圍成一圈拍攝。