Developer options, about mobile phones, version number.
There is news that the OnePlus 9 series will be equipped with a modified version of ColorOS. More and more news has been confirmed that "the Chinese version of the OnePlus 9 series has made up for the shortcomings of the system." According to the latest news, the Chinese version of the OnePlus 9 series will use the “first-tier” operating system. Obviously, the “first echelon” here most likely refers to ColorOS. If nothing else, the OnePlus 9 series may adopt a reskinned version of ColorOS like realme. This time, the Chinese version of the OnePlus 9 series should use the streamlined Hydrogen OS system based on ColorOS 11, which is no longer a native Android system.