The purchase did not bring joy, the product is bad.
I asked the manufacturer's manager what sets this model apart from the GA 5030 before making a purchase.
I did not get a clear response, and there was no mention of a long button, so I'll try again.
Pros
Those who are skilled with their hands will appreciate that the power is cut off as soon as the key is released.
Cons
Poorly placed ignition key. There is no key lock and no soft start. The broken key cannot be fixed. I called the service center to ask if they stocked such push-to-start switches, and they said I'd have to place an order from Hong Kong and wait.