I can't speak for where you live, but living in the US not paying for faster shipping, it took 16 days for me to get my order. They do have a break down on the site of how long it can take.
This is directly from Health Cabin's site on
shipping
China Registered airmail(RRxxxxxxxxxCN) generally takes 15 -60 business days to deliver package to most countries(customs).China airmail always have the lowest priority almost everywhere.If you do not have patience to wait your order,we do not suggest you to choose china registered airmail.
Japan,Korea,New Zealand 80% 10~25 business days
USA,Canada,UK 80% 15~40 business days
Russia,Ukraine,Poland,Italy,Spain 80% 20~60 business days.
Other Countries,Please contack us.