BYD, initially a battery manufacturer, has evolved into a leading player in the new energy vehicle (NEV) sector. The supply chain management of BYD Company Ltd is characterized by rapid battery and motor innovation and a strong backward integration model, achieving over 50% self-sufficiency in parts. This strategy has significantly reduced production costs from approximately 257,500 in 2021 to 159,000 in 2023. BYD utilizes smart supply chain practices, including AI and big data, to enhance logistics and demand forecasting. Sustainability efforts are integrated through green procurement and circular development strategies. As BYD expands internationally, it faces challenges in cross-border logistics and regulatory frameworks. Despite its strengths in cost control and supply security, issues such as slow delivery times and fragmented data systems remain. Additionally, the company must navigate ethical and regulatory risks associated with global sourcing, contrasting with Tesla’s software-driven competitiveness and distributed manufacturing strategy.