Even though I am native chinese and never been in States, my English is reasonable good enough to understand question of delivery status and tracking no. and many buyers asked and will ask the same question.
A few buyers posted above asked the same question.
I am adviced not argue with customers.
But I can not help to clarify that I am not a hard seller.
The true story is more than a tracking no. Someone simply forgot the key point in purpose.
I will close my mouth on this issue immediately from now on.