1. This is the full tracking of your parcel:

China Post Register Air Mail Tracking System
Parcel No.RN638528460CN tracking result
2016-07-05 15:01:58.0 Wuhan process center received
2016-07-05 15:52:49.0 Wuhan process center customs scan
2016-07-05 15:53:17.0 leaving Wuhan process center ，next station Wuhan center
2016-07-05 16:11:39.0 Wuhan Transit Station export security scan
2016-07-07 10:22:11.0 Wuhan Transit Station export customs scan (domestic transit )
2016-07-10 10:30:44.0 Guangzhou Transit Station export security scan
2016-07-13 14:39:25.0 Guangzhou Transit Station import customs scan
2016-07-15 14:18:08.0 Guangzhou Transit Station import customs cleared (domestic transit )
2016-07-22 14:50:04.0 arrive Wuhan process center delivery office
2016-07-22 14:56:06.0 Wuhan process center 已rejected
2016-07-22 14:56:06.0 Wuhan process center received
2016-07-22 15:00:11.0 Wuhan process center customs scan
2016-07-22 15:00:38.0 leaving Wuhan process center ，next station Wuhan center
2016-07-22 15:11:26.0 Wuhan Transit Station export security scan
2016-07-27 17:16:19.0 Beijing Transit Station export customs scan (domestic transit )
2016-07-28 09:57:15.0 Beijing Transit Station export security scan
2016-07-28 15:20:41.0 Beijing Transit Station import customs cleared (domestic transit )
2016-07-31 09:25:45.0 Wuhan Transit Station import customs scan
2016-07-31 12:29:52.0 Wuhan Transit Station import customs cleared (domestic transit )
2016-08-01 06:37:50.0 arrive Wuhan 金家墩发投station delivery office
2016-08-01 07:19:00.0 Wuhan 金家墩发投station attempt delivery
2016-08-01 12:26:35.0 Wuhan 金家墩发投station delivered

2. Your parcel is not passing the China Post Export Security Scan. You should contact seller and provide him with the tracking above. Tell him that the parcel has not left China yet and it is block.

3. You will need to make some sort of arrangement with the seller.

Hope this help.