1. For tracking number CP327837440CN, it's a valid tracking number. If you just got that tracking number sometimes it can take up to 10 days before the tracking number gets register into the China Post system.

2. If after 10 days you still can not track your parcel, then contact seller and ask him if he did physically mail the parcel.

3. For tracking number CP327837436CN, the tracking result is this:
Number: CP327837436CN
Package Status: In Transit
Destination Country: Canada
2016-10-06 20:12 51010100,China, International item mailed in originating country
Origin Country: China
2016-10-07 19:45 Exchange Bureau in Guangzhou, have been exported to open
Powered by http://www.track-chinapost.com

4. You are aware that this parcel is Register Surface mail to Canada and you can track it on the Canada Post site.

5. Now your parcel has not yet got through the China Post Export Security scan. You may want to read this:

What does the status “Export Security Scan” mean? How long it will take?

Hope this help.

1. If you are talking about this one CP327837440CN, then you should maybe wait another few days because all last week in China it was National holiday so mailing system was not working.

Hope this help.

Quote from csoto on October 14, 2016, 02:50
tracking # CP327837440CN shows now expired on http://track.track-chinapost.com
what can i do now?

CP327837440CN is invalid number.

Quote from csoto on October 14, 2016, 08:25
what do you mean invalid?

1. ChinaPost Volunteer meant this when he track your parcel:
China Post Register Air Mail Tracking System
Parcel#CP327837440CN is invalid, China Post has not received any parcel associated with !
Read this article to understand the reason and solutions.

2. If you go on to this site:
http://track-chinapost.com/startairmail.php

3. You will be able to find out that the tracking number is a valid tracking number. If the parcel is not showing up on the China Post site maybe the seller did not mail the parcel or the China Post has not register the parcel into their system yet.

4. The week after your parcel was mail was a National holiday all week in China so China Post was not working only skeleton staff was on duty.

5. You should give the parcel a chance to get register till next week on the 19 Oct and if by that date you still can not track your parcel, then contact seller and ask him what is going on with your parcel.

6. As a matter of fact you could already contact seller and tell him you can not track your parcel so far, was it mail or not.

Hope this help.