Thank you for your feedback. The Xiaomi 15 battery cover adopts a volcano-shaped raised design at the Deco position in the top-left corner. Under certain viewing angles, this can create the visual perception that the top-left corner is slightly higher than the middle frame. However, this design does not affect the structural integrity or functionality of the device. Additionally, every device undergoes rigorous quality inspection before leaving the factory to ensure compliance with high manufacturing standards. Please rest assured that this does not impact normal usage, and you can enjoy your device with confidence. Thank you for your support and understanding.