Hi Paul McGrail,

By checking the shipment details of your package, your package seems didn't pass the security check and is back to the sender now. You'd better contact the sender to let him know this and let him contact China Post to ask why.

Tracking result for CP340842943CN:

2016-12-17 14:01
Beijing Exchange Bureau, import each other (internal transit)

2016-12-17 14:01
Exchange Bureau in Beijing, returned, notes (d)

2016-12-17 09:35
Exchange Bureau in Beijing, has imported opening notes (return)

2016-12-14 21:49
Beijing airport terminal, left hand navigation

2016-12-14 21:47
Beijing airport terminal, arrival

2016-12-14 09:11
Exchange Bureau in Beijing, has been exported

2016-12-14 00:13
Exchange Bureau in Beijing, have been exported to open

2016-12-11 13:56
Shanghai Exchange Bureau, have been exported to each other (internal transit)

2016-12-11 08:40
Shanghai Exchange Bureau, have been exported to open

2016-12-09 17:41
PuTuo branch post office, leave, next stop "Shanghai"

2016-12-09 16:17
PuTuo branch post office,

2016-12-09 13:52
PuTuo branch post office has been receiving and sending