Quote from rick77 on April 18, 2016, 16:24
Hi, I placed an order on March 26, 2016 with the tracking number RO226486109CN. As i have checked the status It has not changed since April 1st and says "leaving Beijing Airport going to next airport/seaport". Do you know what is going on? It hast been almost 3 weeks since then and I have no updates on when my package is going to arrive. Thanks!

You should have a look at this for your country:
China Post Airmail Parcel Estimate Arrival Time
On this site:
http://track-chinapost.com/China_Post_Arrival_Time_Stat.php

Like you stated what I found is the same thing as you:
01.04.2016 01:10 Flight depart Beijing Terminal 10000061

Maybe your parcel is already in Mexico at the Customs Office.
Maybe you could give a call to the Mexican Post Office to find out if there is a parcel for you.

Hope this help.