Question: Why we open Batch 6 which is scheduled to be shipped in three months?

Answer: The sales page of Batch 6 is for committing the reservation requirement of Large Buy, is not for the purchase of Retail Sales.

Ok, got it,   prior bulk buy was a bit cheaper: 
https://bitmaintech.com/productDetail.htm?pid=00020141223160858878EmLu6L5Q067D