Although assembled to the gorgeous current lineup, the film still encountered a lot of resistance during the filming process. The first thing to bear was the problem of shooting on location. According to the requirements of the script, the crew is bound to find a cliff with a sense of deterrence. After a lot of searching, the crew delineated the location in the Dongjiang area. The unique geographical conditions and steep scenery here are just in line with the setting of the script. But the key plot happens at night, which requires very strong lighting conditions. During the six-day shooting period, the crew did their best to use more than 40 steel cable cranes and more than 200 lighting equipment. It is worth mentioning that the lighting equipment weighs 18 kilograms per set, and requires three strong men to work together to operate, and all the equipment weighs up to 3.5 tons. Even more than the amount of lighting that illuminates the entire Jamsil Baseball Stadium during the night game, it can be regarded as a big innovation in the history of Korean film.
Another problem with shooting is the framing of the train station. According to the script, an important chase shot will be completed at Longshan Railway Station. But the actual situation is that as a large railway station in a city, it is difficult to dispatch Longshan Station. The crew had to change their course and set their sights on Busan Station, where many film and television dramas had been filmed. Since the chase scene will not only involve the exterior scene of the station, but also the platform part, it adds to the difficulty of shooting. Although with the strong assistance of the Busan Film Committee, the crew approached the head of the South Korean Railway Busan Gyeongnam branch, but the other party was still full of worries about the shooting plan. Fortunately, after browsing the script roughly, the person in charge was moved by the plot and finally agreed to coordinate the crew to shoot in the station. In order not to cause trouble to the railway officials, the entire crew had simulated drills many times before the actual shooting, and finally completed this thrilling key drama in the shortest possible time with quality and quantity.
