I recently placed some orders from Aliexpress and it is my first time buying anything from it. So most these orders are shipped using China post and the tracking number given by seller shows the tracking details, but the problem is that none of the tracking number shows whether the parcel has left China or not. One of the tracking number 04857092434 shows it is at the security scan at Guangzhou since 16/04/2017 and this one too 04874838836 looks stuck at recieved by linehaul.
What does it mean for the these status and whether both the parcel have left China or not. Previously I had placed an order from another Chinese shopping site called lightinthebox.com and they had shipped my parcel through Sweden post which too had only half tracking information(no tracking after it had left Sweden) but I had received my parcel on 24th day from its shipment. So considering that neither parcel have anything worth customs forbidden item list will I receive them before 10/05/2017.

Thanks chinapostvolunteer for answering to my query,
but it is been more than two weeks and it is still the same status and how do I know whether it is in India or not. There was another parcel of mine which was showing as departure from origin country that is China but a week later it again shows a refreshed status with another date as departed from the country of origin. I feel little confused as what really is going on here.

So Finally I received my three orders from Aliexpress, one of which was shipped using China post small packet plus service and two others using Yanwen economic mail courier. The China post parcel was shipped on 14/04/2017 and arrived on 19/05/2017 and while one of the Yanwen parcel was shipped on 26/04/2017 and other one on 24/04/2017 but both of them arrived on 19/04/2017 much faster then expected. Still waiting for one more China post parcel hopefully I will receive it on time. Just to help my friends who worry for their parcel to be received through China post in India, do visit your local post office once 30 days are past the shipping date regarding knowing the whereabouts of your parcel.