For those who is in the path of Qi cultivation,
The physical body is analogue to a stove. The intention power is analogue to the fire. The breathing is analogue to the wind.
When the Stove is in a proper state, the fire in a proper strenght, the wind in a proper strenght amount, Chi must surface. and one could manage the strenght of the Qi via the strenght of the wind and fire.
clear and simple.
However, without knowing the stove, knowing not the fire and wind and the amount of the strenght. no path to lead into this practice.
It is a technology, and modern science will only prove its existance.