1. This is the tracking of your parcel:
China Post Register Air Mail Tracking System
Parcel No.RF418427807CN tracking result
2016-11-12 15:35:00.0 Electronic Data Received
2016-11-19 18:04:36.0 Shenzhen city international parcel process center received
2016-11-19 21:02:00.0 Shenzhen city international parcel process center customs scan
2016-11-19 21:06:00.0 leaving Shenzhen city international parcel process center
2016-11-20 01:49:25.0 Shenzhen Transit Station export security scan
2016-11-20 16:09:22.0 Shenzhen Transit Station export customs cleared
2016-11-21 22:31:00.0 arrive Guangzhou Airport
2016-11-21 22:31:00.0 arrive Guangzhou Airport
2016-11-22 00:00:50.0 leaving Guangzhou Airport going to next airport/seaport
2016-12-02 12:52:26.0 Shenzhen Transit Station export security scan
2016-12-02 14:09:40.0 Shenzhen Transit Station import customs cleared (domestic transit )

2. Your last tracking is indication that the parcel had problem possibly on the 22 Nov trying to leave China and did not depart because of a security reason.

3. Your last tracking is indication domestic transit = which mean traveling inside China and Import = meaning importing back to China.

4.. I suspect your parcel is possibly going back to your seller. May I suggest you contact seller and give him the above tracking and say to him that the parcel was refuse to go out of China.

5. You may want to have a look at this also:

China Post Forbidden Item List

What does “Import Customs Scan” mean?

Hope this help.