Quote from Mapejf on April 9, 2016, 13:50
My order was checked and then rejected, the same day it was sent is now transferred again. what might be going on? The order is a Drone (engines and
Track RS001701985CN

Guangzhou international parcel process center received
2016-03-30 21:43:23.0 Guangzhou parcel process center customs scan
2016-03-30 23:21:14.0 leaving Guangzhou parcel process center ，next station Guangzhou Airport
2016-03-31 09:33:57.0 Guangzhou Transit Station export security scan
2016-03-31 10:46:12.0 Guangzhou Transit Station export customs cleared
2016-04-05 00:56:00.0 arrive Guangzhou Airport
2016-04-05 00:56:48.0 leaving Guangzhou Airport going to next airport/seaport
2016-04-05 06:54:47.0 Guangzhou safety check rejected
2016-04-05 18:07:00.0 arrive Guangzhou Airport
2016-04-05 18:22:39.0 leaving Guangzhou Airport going to next airport/seaport
2016-04-08 14:57:35.0 Guangzhou Transit Station export customs scan (domestic transit )

I suspect your parcel is returning to the seller because of this:
2016-04-05 06:54:47.0 Guangzhou safety check rejected

I might be wrong but:
You might want to contact your seller to find out exactly what is going on with your parcel. He might be able to contact China Post to have a better picture of your parcel status.

Hope the above information will help you.

Quote from Mapejf on April 9, 2016, 15:19
you believe should I open a dispute?

I suggest you contact seller first before opening a dispute.
After his response then you can make a decision what to so!

Hope this help.