The tracking number of 11 digital letters without alphabet letter is the China Post Ordinary Small Packet Plus service and it is not registered, so could not be tracked. This kind of service is very slow, usually takes two months, even longer. I guess you need to wait

If you have more questions, please dial the China Post customer service hotline 11185 if you are in China and +86 10 11185 if you are outside China. For English service, please press 8 after the call is got through..