Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Poster | Salute to the laborers! Author: Li Jing