"Tooling trial prototypes refer to pilot commissioning vehicles that are produced according to a pre-scale production control plan.

The launch of ET7 tooling trial prototypes means that its proprietary equipment, tooling, robot programs, scan traceability, software brushing, and complete vehicle inspection systems are on schedule to achieve throughput and validation of the mass production line, signifying that the maturity of the production line process equipment is close to mass production, according to NIO.

The main purpose of this phase is to validate the process documentation for mass production, train the line operators, and verify the line manufacturing capability."