Many talk of the neigong and or the inner alchemy (neidan) process as being about transforming jing-qi-shen-wu, which is the movement of the natural cycel from unmanifest to manifest. But this is the post-heaven orientation. Daoist meditation is about returning the shen, not sending it outwards. Neigong follows the reversed process of wu-shen-qi-jing, returning from the manifest to the unmanifest. It is this that enabled the remarkable accomplishments of the sages. Both approaches talk of dantian and various things, but the methods are different.
I'm a bit confused by these correlations? Doesn't jing-->wu = manifest-->unmanifest & wu-->jing = unmanifest-->manifest?
I mean, jing = manifest & wu = unmanifest, right?