Good afternoon .   Good afternoon . Can I help you ?   I've got this important letter to send to Hainan . Can I send it by registered mail ?   Certainly .   How much will I have to pay ?   Two yuan , please .   Here are the letter and the money .   Wait a moment . It seems that your letter is overweight . Let me weight it .   Is it overweight ?   I'm afraid it is . So you will have to pay two yuan extra . The total charge is four yuan .   All right . Here is the money .   Here are the stamps and your receipt . 