Introduction to the preface hall: The preface hall and atrium are located on the first floor of the Honghe State Museum. They share a theme with the mobile exhibition hall at the exit of the first floor: "The Rich and Beautiful Red River". The prologue hall is located at the entrance of the exhibition hall on the first floor. It includes a preface, a group of sculptures, large-scale ethnic embroidery, a sand table model of the terrain of Honghe Prefecture, etc. It is the place where visitors enter the museum to have a preliminary understanding of the history and ethnic culture of Honghe Prefecture.