Introduction to three squares and one screen wall: The screen wall in Bai folk residences is the embodiment of art and the business card of the Bai family's surname. In the history of their own frontier expansion, the Zhang family recognized Huangdi as the blood ancestor of the Zhang surname. Huangdi had a son named Zhang Hui, who was a bow and arrow supervisor. , written on the screen wall of the residence are "Bairen Family Style" and "Qinghe Family", which are the surnames and the appellation of the place of origin.