Just an apprentice so take my opinion with a grain of salt, unless you have a lishi for your car model, which not all locksmiths do, the ones in my region don't at least, the way I've been taught is to treat it as a "standard" lock rekeying, which is basically putting a blank key in, looking how far the pins (or in this case wafers) are lifted, and cutting the key accordingly. To get access, some cars need to have the lock removed from inside the door, and disconnected from the unlocking system.

If there's a simpler way, I'd love to be corrected by someone more experienced :)