1. This is the tracking of your parcel:
China Post Register Air Mail Tracking System

Parcel No.CP332826025CN tracking result
2016-10-11 10:04:04.0 Shenzhen Transit Station export security scan
2016-10-11 13:33:10.0 Shenzhen Transit Station export customs scan (domestic transit )
2016-10-11 13:38:16.0 Shenzhen Transit Station import customs scan
2016-10-11 13:39:59.0 Shenzhen Transit Station import customs cleared (domestic transit )
2016-10-11 17:51:34.0 arrive 西乡dept. delivery office
2016-10-11 18:54:07.0 西乡dept. attempt delivery
2016-10-11 18:54:52.0 西乡dept. attempt delivery
2016-10-12 16:33:13.0 西乡dept. attempt delivery
2016-10-12 16:33:47.0 西乡dept. attempt delivery
2016-10-12 20:06:00.0 西乡dept. delivered
2016-10-19 16:26:29.0 Shenzhen city 西乡center 营业部 delivered

2. Your parcel never departed China. You should contact seller as soon as possible. Parcel was sent back to him.

3. Your parcel did not pass the Export Custom, look here:
2016-10-11 13:33:10.0 Shenzhen Transit Station export customs scan (domestic transit )

4. So your parcel was imported back:
2016-10-11 13:38:16.0 Shenzhen Transit Station import customs scan

5. You might want to read this:

What does “Import Customs Scan” mean?

Hope this help.