I bought an item off a seller a few days ago, he seems very reliable with almost 2,400 sales and a 99% rating. However he isn't communicating very often and the one time he does he says.

Hello friends, goods in transit, we use the China post registered parcel, can't tracking information, please be assured that you receive the goods soon, thank you.

Then he added a tracking number onto the website ( which after 4 days still hasn't been picked up).

Did he send the item without a tracking number? Or is it a scam? He seems a very reliable guy its just difficult to communicate with him (that was his only message throughout so far).