A ——air mail B —— date stamp
C —— Express Mail Service (EMS) D—— express delivery letter
E —— letter box F —— please forward
G —— post-office box H ——registered letter
I ——sub-post office J —— telecommunications service
K —— regular mail L—— mail order
M —— mailing list N ——postage stamp
O —— post-free P ——postage paid
( ) 特快专递 ( )面付邮资