WeDo Express is quite new logistics service. It has a number of advantages as well as disadvantages.
The main advantage of WeDo Express packages is that you can see photo and weight of your package. As for disadvantages, this service is less secure. There is no checksum validation in WD...CN Tracking numbers. So, anyone can change a couple of digits in any tracking code and get information about third party parcels.
The most convenient way of tracking WD...CN packages in tracking number checking extension:
Daily deals on AliExpress: