What is the cheapest mail service if you are mailing from hong kong to the us?

I want the cheapest company to use.What is the cheapest mail service if you are mailing from hong kong to the us?
the cheapest will be snail mail, which could take weeks for the mail to be delivered.What is the cheapest mail service if you are mailing from hong kong to the us?
when you are in post office, they will ask you which type of mail you want to send, and you can choose the cheapest one. mail office is the cheapest way to ship things to the state.What is the cheapest mail service if you are mailing from hong kong to the us?
http://app1.hongkongpost.com/calc/eng/ov鈥?/a>

you can check it for your self above are Hongkong pos office web site