Introduction to the city gate of "Guanzhong Swordsman": This city gate was built in 2002 for the filming of China's first digital film and television "Guanzhong Swordsman". In order to highlight the vicissitudes of the historical era, film artists specially created mottled traces on the city walls. Due to the realistic production techniques, they were later used in the TV series "Fire Dance in the Yellow Sand", "Water Margin", "Sweat Horse" and other films. Used multiple times.