Is it illegal to retrofit an old model with a new front face?

[DeTessa]

Retrofitting an old model with a new front face is not illegal as long as it is legally registered and documented with the vehicle management office. If not registered, it is considered an illegal act. Modifications not permitted by law: No entity or individual may assemble a motor vehicle or alter its registered structure, construction, or features without authorization. Unauthorized modifications to the chassis, engine, suspension, transmission system, steering system, tires and rims, lights, body color paint, and exterior structure, as well as any technical data that does not match the data announced by the State Council's motor vehicle product department, are considered illegal modifications. Precautions for modifications: Only the original manufacturer's engine can be replaced for power modifications, and an application for change registration must be submitted to the vehicle management office within 10 days after replacement; spraying or pasting logos or advertisements on the vehicle must not affect safe driving, which is a strict regulation; the body cannot have more than three main colors, and the use of fire engine red, engineering vehicle orange, police vehicle blue-white, or special vehicle camouflage colors is prohibited.