1. This is the full tracking of your parcel:
China Post Register Air Mail Tracking System
Parcel No.03728078928 tracking result
2016-09-17 09:24:00.0 Electronic Data Received
2016-09-18 17:57:36.0 Dongguan city Post Office eCommerce dept. international parcel process dept. received
2016-09-18 18:18:00.0 Dongguan city Post Office eCommerce dept. international parcel process dept. customs scan
2016-09-19 12:47:09.0 Guangzhou Transit Station export security scan

2. And the other one full tracking:
China Post Register Air Mail Tracking System
Parcel No.03721478170 tracking result
2016-09-16 09:24:23.0 Electronic Data Received
2016-09-17 17:30:16.0 Dongguan city Post Office eCommerce dept. international parcel process dept. received
2016-09-17 19:27:00.0 Dongguan city Post Office eCommerce dept. international parcel process dept. customs scan
2016-09-17 19:36:00.0 leaving Dongguan city Post Office eCommerce dept. international parcel process dept.
2016-09-18 13:54:14.0 Guangzhou Transit Station export security scan

3. Because both parcels are China Post Ordinary Small Packet Plus sometimes there is limited tracking to those parcels. It can take from 30 to 60 days before delivery to your country.

4. To make sure that both parcels pass the Export Security scan you could contact the seller and give him the above tracking and ask him he could call China Post to find out if the parcels have pass the Export Security scan. Most of the time they do pass but we don't have any more tracking for the parcels so we don't no.

Hope this help.