Our phones undergo rigorous professional inspection before leaving the factory, so you can rest assured of their quality. We have adopted the new LTPO (Low-temperature polycrystalline oxide) technology, which allows adaptive refresh rates under different brightness and scenarios. To ensure display performance at low brightness levels, we use 480Hz low-frequency PWM dimming. During transitions between high and low brightness, you will notice slight brightness changes. This is a normal phenomenon due to the technology employed to optimize battery life while ensuring excellent display performance. We are constantly working on further optimizations to enhance your experience.