This statement was not correct. Black market transactions in movies didn't always happen in abandoned factories. In movies, black market transactions often appeared on the streets of cities, basements, caves, bridges, and so on. As an independent place, the abandoned factory was not a place where illegal transactions often occurred. However, the abandoned factory could indeed become a place for criminal activities, but this was not because there were often black transactions there. It was because abandoned factories were usually a relatively safe place because they had been abandoned for many years without human habitation and there were not many machines and equipment, so it was not easy to find them. In addition, the facilities in abandoned factories are often old and lack maintenance, which may increase the risk of criminal activities. Black market scenes in movies don't always happen in abandoned factories, but abandoned factories can become a common place for criminal activities.