In the opening battle scene of the film, in order to be able to shoot in Busan Port, the largest in the Republic of Korea , the production team submitted a detailed shooting plan to the relevant departments of Busan Port early in the morning, including detailed routes for equipment, staff, and actors.
In the film, a chase scene between Seo Do-cheol and Cho Tae-wo was filmed in Myeong Dong , a landmark of Seoul where high-rise buildings and citizens gather, and the most complex and crowded street . From the planning stage, the film communicated with relevant departments of all parties to obtain filming permits and on-site support. 류승완 and Huang Zhengmin also personally went to the Namdaemun Police Station in the jurisdiction of Myeong Dong to make a request, so that the Republic of Korea film was filmed at the Myeong Dong Center for the first time. During the filming, comprehensive traffic control was carried out on 8 lanes of Myeong Dong, and it took four nights to invest more than 80 vehicles to complete the filming
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