The red brick building in front of us is the first door to enter the temple area - the Duanmen, symbolizing the beginning. The end gate is a pure brick structure building, with a higher middle gate and slightly lower left and right. Above the left and right door openings, the inscriptions "Jingzhong Pass through the Sun" and "Dayi Pass through the Sky" integrate the loyalty and righteousness of Guan Gong into the couplet.