Don't worry about it. In normal, it will be sent by another airline in the following days. You also need to track it in the following days to see if it will leave China successfully. If no, contact the seller to give you a solution.
Tracking number CP393498513CN says Guangzhou exchange station return. Does this mean it’s on its way back to the seller? Or just returning to the station to wait to get on a plane again? Or something else? Should I contact the seller or is this normal?
My pack stating in the same place LW243568664CN Guangzhou, Guangzhou Exchange Station returned 2019-12-11 18:58 Guangzhou, Back 2019-12-11 10:12 Guangzhou, delivered to air transport 2019-12-11 09:29 Guangzhou, leaving Guangzhou International, the next stop , Guangzhou Exchange Station (via transfer) 2019-12-11 05:03 Guangzhou City, "Guangzhou International" return, note: security return 2019-12-10 07:02 Guangzhou, delivered to air transport 2019-12-09 11:13 Guangzhou City, "Guangzhou International" return, note: security return 2019-12-05 06:40 Guangzhou, delivered to air transport 2019-12-05 04:34 Guangzhou, arriving at Guangzhou Exchange Station (via transfer) 2019-12-05 02:36 Guangzhou, Guangzhou International has been exported directly sealed