You said the same thing I did. Chi and the element of spirit being the same thing. It's an element called spirit, which is the primal life force that shaman tap into to summon elementals and also to heal. Pandaren simply call it chi. What I said is that chi does not refer to a spirit but the element of spirit, which is still represented by a spirit... There's 6 elements in the Warcraft universe: Spirit, Decay, Air, Earth, Fire and Water. From what I've gathered, they use the element of spirit to communicate with the 4 original elements we know of to seek their blessing to use their power... Look it all gets extremely confusing, but what it refers to is pretty much this:
http://wow.gamepedia.com/Spirit_of_Life