The SNCF counter cannot handle checked luggage directly. There are 3 methods, but there are only 2 methods commonly used by Chinese people:
1. Go to the SNCF counter and tell them that you need to make an appointment to check in your luggage, and then they will ask Personal information, address information, etc.
2. Go to the SNCF official website for self-service registration
All SNCF shipments need to be booked in advance. Generally, you can make an appointment for the next day at the earliest, and then choose to pick it up at your door. Please indicate the time and address of the parcel, and make an appointment with the time and place for collection. Fill in the quantity of the package, weigh it yourself, and pay directly by credit card. The waybill will be generated online, so you don’t need to print it yourself.
Laposte staff will knock on your door as scheduled. Yes, SNCF consignment is actually operated by LAPOSTE. They will weigh the weight of each package, and if the declaration is correct, they will put your package into a plastic bag. The bag will have a barcode and waybill attached, and it will be sealed in front of you. You sign to confirm, and that's it.
In addition, if you are overweight, you will need to pay the price difference.