Why can't China Post EMS find logistics information?

There are three reasons why postal EMS can't find the logistics: \x0d\No. 1, and this courier was never delivered. \x0d\ 2. The courier number provided by the other party is wrong. \x0d\ Third, the logistics can't be found due to the failure to update the express delivery system. \x0d\ Logistics cannot be queried for more than three days after the other party delivers the goods. If you are the recipient, you need to give feedback to the sender.