1. This is what I found about your parcel:
International Mail# LT134673349CN Tracking Result
Summary
Tracking number Origin Destination Status
LT134673349CN CHINA UNITED STATES On route

History Detail
Local date/time Activity Location Remarks
03-Sep-2016 16:44 Received by Post Office 518021
04-Sep-2016 03:35 Departure export customs SHENZHEN EMS

2. According to the tracking above your parcel is On route to USA. Sometimes with E Packet we know were the parcel is heading in USA, for your parcel there is no information but it's On route.

3. Normally E Packet can take from 6 to 12 working days to be deliver. I'm sure your parcel is fine, if you don't see any tracking it does not mean the parcel is not traveling. Just keep tracking through the USPS site and in a couple of days you will see possibly some movement.

Hope this help.