When tracking an EMS parcel, once it has left China, you need to go to Canada Post tracking site and enter you tracking number.
https://em.canadapost.ca/emo/basicPin.do
Once it leaves China, and arrives in the purchaser's country, it then is out of the EMS hands. You have to track it through your own country's postal system. Hope this helps.
Thanks..I tried it out and apparently the fine folk in GUANGZHOU have decided they REALLY like my package. I bet they're all giggling to themselves while they smoke it!