2. Kaiyuan Temple in Quanzhou was built in the second year of Tang Dynasty (686) and was destroyed by fire at the end of Yuan Dynasty. At the end of Hongwu, the mountain gate, the main hall and the altar were rebuilt, and the city wall was rebuilt in the fourth year of Wanli (1576). At present, the three rooms in the middle of the mountain gate are the original objects of the Ming Dynasty, and the rooms between the two tips and the Baiting Pavilion are newly added. The main hall is nine rooms wide and nine rooms deep, resting on the top of the mountain with double eaves. It is grand in scale and unique in shape. If calculated according to the plane column network, this hall should have 100 columns, so it is commonly known as the "hundred-column hall", but in fact, only 86 columns are left because of subtracting two rows of inner columns. The wooden structure above the ceiling in the temple adopts the traditional bucket structure in the south. The bucket arch is large and sparse, and there is still a legacy of the Song Dynasty. Its outstanding feature is that the Chinese archway with internal columns and arches is carved into flying geisha music, which is an obvious example of the cultural exchange between Quanzhou and overseas buildings. Tan Jie's architecture is also unique. The altar is covered with octagonal double eaves, surrounded by houses and cloisters, forming a group of architectural groups with rich shapes.