1. This is the tracking of your parcel:
China Post Register Air Mail Tracking System
Parcel No.RI652409242CN tracking result
2016-09-13 20:57:44.0 parcel center received
2016-09-13 22:07:13.0 parcel center customs scan
2016-09-13 23:21:47.0 leaving parcel center ，next station Shenzhen center
2016-09-14 00:35:02.0 Shenzhen Transit Station export security scan
2016-09-14 13:33:04.0 Shenzhen Transit Station export customs scan (domestic transit )
2016-09-18 11:06:27.0 Guangzhou Transit Station export security scan
2016-09-18 13:30:40.0 Guangzhou Transit Station export customs cleared
2016-09-19 18:30:00.0 arrive Guangzhou Airport
2016-09-19 18:51:48.0 leaving Guangzhou Airport going to next airport/seaport

2. And this one:
International Mail# RI652409242CN Tracking Result
Summary
Tracking number Origin Destination Status
RI652409242CN CHINA MEXICO On route

History Detail
Local date/time Activity Location Remarks
13-Sep-2016 20:57 Received by Post Office 51810302
18-Sep-2016 15:14 Departure export customs GUANGZHOU

3. So according to the above tracking, your parcel is On route to Mexico. When it arrive you will be able to track it through the Mexico Post site.

4. May I suggest you read this for your country Mexico:
http://track-chinapost.com/China_Post_Arrival_Time_Stat.php

5. Your parcel is fine I don't see anything unusual about your parcel. You just need to wait for it.

Hope this help.