Why is there glue residue/glue overflow/glue line gap on both sides of the Xiaomi 15 Ultra receiver?

The Xiaomi 15 Ultra uses advanced caulking glue technology to fill the gap between the middle frame and the screen, improve the exquisiteness of the front appearance and improve the waterproof effect, and has undergone fine automation and manual polishing.
The arc transition is used on both sides of the earpiece gap to ensure that the sound from the middle opening of the earpiece is smoother. The caulking glue on both sides will be slightly different with the arc. Due to the different materials of the screen, caulking glue, and middle frame, there will be different reflective effects under natural light, which can make you feel that there is residual glue or overflow on both sides of the phone earpiece. This is a normal phenomenon, not a quality problem, and does not affect the waterproofing and calling functions. Please rest assured to use it.