Thanks for your reply.
I have confirmed the details below with my manager,just for your reference:
1.The order that will be shipped in Feb,its price is below:*****
The order that will be shipped in Mar.,its price to be announced later.
2.You has added 6tons tusche in PO#01-200111 yesterday.However our production department can not produce this big qtytusche so soon,we can not delivery it on 22th,Feb.We hope you'd better keep the order details and do not make any change.If you insist in purchasing 6 tons tusche,please put this item inorder of March,andthere may be some difference in price.