Pop art pioneer Alex Katz, who grew up in the New York metropolis. The United States after the Second World War, is a symbol of technological, advanced and avant-garde. Katz's theme of life group portraits, fashionable tones, and computer graphics-like character images were just in line with the aesthetic taste of the new era. His artworks have appeared in New York Times Square, Foley Square, Park Avenue and other public spaces, became part of the city view.