Traditional technology: 45° chamfering and sun angle treatment: Before or during the inlaying of exterior wall tiles, the construction personnel will chamfer a certain specification and quantity of facing tiles at a 45° angle as needed. Cutting processing. When inlaying, two adjacent tiles face each other at the sun corners to form a right angle, shaped like a figure of eight, which is also called the figure-eight joint treatment method. This is also the construction method that is clearly stated in the construction specification (GB50327-2001). This treatment method makes the lines of the sun corners neat and uniform, which is more beautiful, but cutting at a 45° angle is more labor-intensive and time-consuming; and because the tile material is relatively brittle, small gaps are prone to appear during cutting; if not handled properly, sun corners may also appear. Defects such as uneven width of the joints and uneven verticality; in addition, water seepage is easy in the joints. If the plaster base of the exterior wall cracks, it may cause quality problems such as water bleeding in the exterior wall. When cutting at a 45° angle, soak the tiles to be cut in water for 1-2 days in advance, which can improve the defect of small chips that are prone to occur during cutting.