Auto parts are extremely diverse, and their production lines therefore vary greatly. Examples include Stamping Lines for body panels and structural parts; Welding Lines for sub-assemblies and body-in-white; Interior & Exterior Trim Lines; Injection Molding Lines for plastic components; Painting Lines; and Electronics & Electrical Parts Lines for the vehicle's "nervous system". Auto parts production lines are complex systems involving interdisciplinary and multi-technology integration. They are not merely simple series of machinery but represent the deep integration of process technology, automation technology, and information technology. Their development level directly reflects the overall strength of a country's manufacturing industry. With the popularization of electric and intelligent connected vehicles, higher technical challenges and requirements are being placed on the production lines for new-generation parts.