1. It means that your parcel did not pass the Security and Customs at the Guangzhou Airport and the parcel was rejected because of the Customs scan of the parcel.

2. This tracking means:
2016-07-06 15:01:36.0 Guangzhou Transit Station import customs cleared (domestic transit )

Your parcel is in China getting to the seller.

3. You should contact seller as soon as possible to tell him the problem with your parcel is nos passing Security and Customs at the Guangzhou Airport.

Please provide him with the full scan below:

Parcel No.RH318547988CN tracking result
2016-06-13 15:05:23.0 Guangzhou Int'l Parcel Center received
2016-06-13 15:05:29.0 Guangzhou Int'l Parcel Center customs scan
2016-06-13 22:52:30.0 leaving Guangzhou Int'l Parcel Center ，next station 广商大宗
2016-06-14 19:55:07.0 Shanghai Transit Station export security scan
2016-06-15 12:25:37.0 Shanghai Transit Station export customs scan (domestic transit )
2016-06-18 09:30:51.0 Guangzhou Transit Station export security scan
2016-06-18 13:10:49.0 Guangzhou Transit Station export customs cleared
2016-06-19 18:38:00.0 arrive Guangzhou Airport
2016-06-19 18:47:32.0 leaving Guangzhou Airport going to next airport/seaport
2016-06-20 15:13:00.0 arrive Guangzhou Airport
2016-06-20 15:32:10.0 leaving Guangzhou Airport going to next airport/seaport
2016-06-26 14:51:00.0 arrive Guangzhou Airport
2016-06-26 16:30:31.0 leaving Guangzhou Airport going to next airport/seaport
2016-06-27 11:47:00.0 arrive Guangzhou Airport
2016-06-27 12:09:17.0 leaving Guangzhou Airport going to next airport/seaport
2016-06-28 16:45:00.0 arrive Guangzhou Airport
2016-06-28 17:09:50.0 leaving Guangzhou Airport going to next airport/seaport
2016-07-03 16:15:00.0 arrive Guangzhou Airport
2016-07-03 16:46:43.0 leaving Guangzhou Airport going to next airport/seaport
2016-07-05 09:04:22.0 Guangzhou Transit Station import customs scan ,remark (rejected )
2016-07-06 15:01:36.0 Guangzhou Transit Station import customs cleared (domestic transit )

Hope this help.