I would also like to know OP.
Your link says "breath as less as possible"
I've read book the other guy posted and it says the exact opposite: breath as much as you can…
There are people who say "draw your belly outside when you breath in" and others who say "draw it in when you breath in".
There are others who say "pull your anus inside when you breath in" and others who say "let your anus relax when you breath in"