this kind of 11 digit number is china post ordinary parcel. This is a slow and cheap service for low value item. China Post will not scan and update its status after it left first post office. so you can not see new status and know where it is now. china post ordinary parcel might take 4 to 12 weeks to reach your country.

Now time has passed 3 months, you should open dispute to aliexpress for lost parcel.