Introduction to Zetian Hall: Zetian Hall is the central hall of Huangze Temple. On the door of the hall hangs a plaque "Zetian Hall" written by Wen Tingkuan, and on both sides are couplets written by Guo Moruo. The first couplet is "Zheng Qi" Kaiyuan governed Hongzhenguan", and the second line is "Fangliu Jiange Guangbei Lizhou".