1. I suspect your parcel has difficulty with the Export Security or Customs scan check in China. Here is some info:

China Post Forbidden Item List

What does the status “Export Security Scan” mean? How long it will take?

What is the status of “Export Customs Scan” ? How long it will take?

2. You might want to contact your seller and ask him what is going on with your parcel. Please provide him with this tracking so he understand what you are talking about:

China Post Register Air Mail Tracking System
Parcel No.RS364431085CN tracking result
2016-12-24 21:16:08.0 parcel center received
2016-12-24 21:52:43.0 parcel center customs scan
2016-12-24 23:16:52.0 leaving parcel center ，next station Shenzhen center
2016-12-24 23:57:51.0 Shenzhen Transit Station export security scan
2016-12-25 13:28:22.0 51805300 export customs scan (domestic transit )
2016-12-26 10:02:28.0 Guangzhou Transit Station export security scan
2016-12-26 12:56:51.0 Guangzhou Transit Station export customs scan (domestic transit )

Thanks.

1. Then contact seller and ask him what is going on with your parcel.

Thanks.