You must use [Shop Express courier bag] for the posting service
Tear off the red part of the transparent film
After putting your goods into the bag, press the red film on the tip to close the opening.
After sealed the bag, it can not be opened again, otherwise the courier bag will be seen as invalid
SHOP EXPRESS is a safe and convenient in-store posting service, which allow you to ship your shopping goods back to home without carrying them thru the China customs yourself. This service was launched by China Post Cross border eCommerce Ltd.