how do you build chi. you know for iron shirt and stuff like that
Andre Lashley
get
Get that Qigong book by Liang Shou Yu. Can’t remember the title, I think it was called, “Qigong Empowerment” or something.
try
practicing
Merciless is Mercy.
How?
Iron shirt and stuff like that develop or use chee with certain mixtures of breathing and external methods.
A way to develop chhe might be to…
…walk through the air as if it were earth; and though burried in earth, walk as if through air.
Perhaps some-such
I No_Know~
Very some such,perhaps might have been, likely say some, some not.
no-know - or pretend you’re underwater.
or underwater
That concept is highly acceptable~.
Very some such,perhaps might have been, likely say some, some not.
Iron shirt
Breathing techniques to strengthen the soft stuff (muscles & guts), tapping massage with wooden sticks for the hard stuff (ribs).
3 traditional methods
Alignment and/or Breathing and/or Intention.
You will certainly have to get a teacher and not a book to realistically learn any/all these.
Lyle.?.
I thought that the tappings and massage with sticks also, sent vibrations through the body … which stimulated the internal organs (soft stuff).
Very some such,perhaps might have been, likely say some, some not.
BASICS
Stance Holding, Power Exercises, Footwork and Kicking Drills, Punching Drills, Arm Banging, and a Healthy Dose of Push Hands 
THEN Your ready for Qi.
Although there are many styles, they all depend on the strong beating the weak and the slow falling to the quick. These are not related to the power that must be learned – Taiji Classics