Analyze Huawei's strategic adjustment in its cooperation model with Seres through HarmonyOS Intelligent Driving, focusing on: 1) the implications of Huawei's '5-year no car manufacturing' commitment expiration in March 2023; 2) how the shift to a more behind-the-scenes role might affect future market positioning; 3) potential scenarios after the commitment period ends. Present findings in a structured business case format.