I just received a delivery message from Apple official website and gave me the express number. I checked it right away. Why can't I find it on EMS? What does the delivery number EZ mean at the beginni

I just received a delivery message from Apple official website and gave me the express number. I checked it right away. Why can't I find it on EMS? What does the delivery number EZ mean at the beginning? The single number is as follows:

Official website delivery SMS has been notified, but EMS still can't find the logistics information. Generally, it is because of the delay in updating logistics information. At this time, we have to wait for the logistics information to return and update. Secondly, the odd number at the beginning of EZ has no special meaning, and EZ is only a distinction between odd types.

Introduction:

EMS ("Express Mail Service") is a postal express mail service, which is an international mail express mail service managed by the Universal Postal Union and provided by China Post in China.

This business enjoys priority in customs, aviation and other departments. It delivers international and domestic urgent letters, documents, financial bills, commodity samples and other documents and articles to users with high quality.