It has the beginning of the VIN, ie in this case 7SAY vs. LRW for Shanghai.
https://www.tesla.com/en_CA/my/order/7SAY224_947fdbb3cc810477e6626d5b3767b095?postal=M3H&range=200&coord=43.7489,-79.4422®ion=ON&titleStatus=new&redirect=no#overview
You can also look at the HTML source, where they...