Shiping date to arrive its to fast, from china

[cxmatias]

Hello, I am checking as if a customer buy a product from dser ,from China, and in the check out to pay, it shows me it will arivetheproduct in 2 days, and 1 day if paying 7.8 dolar shipping. 

I think I am putting something wrong  in the settings,  shipping area.

What you think?