Currently, Yanfeng Automotive purchases unique nests for automotive component (i.e. door panel) assembly that hold the base part in place while other features are attached to the base using ultrasonic welding, hot heat-staking with cold air, or cold-staking (with hot air). Features may include sound-deadening materials, map pockets, and speakers. Each assembly step is a stationary process.
For automated assembly, Yanfeng Automotive purchases unique jigs that hold each part/variant that comes down the assembly line.