When sourcing Chinese machines, buyers must prioritize technical compatibility and component origin. Always request a detailed Bill of Materials (BOM) to verify if critical parts (like PLC, motors, and bearings) are from internationally recognized brands (e.g., Siemens, Schneider, Omron) or high-quality domestic brands. Ensure the machine's voltage, frequency, and phase (e.g., 220V/60Hz vs 380V/50Hz) are customized to your local power grid. Additionally, verify the structural steel grade and surface treatment (powder coating vs. painting) to ensure long-term durability in your specific working environment.