Your best bet for ching gong besides becoming a disciple of a living true lineage holding master, and living in a cave or monastery is right here-
http://www.falundafa.org
http://www.clearwisdom.net
Verification and proof of it's ancient roots can be seen in other comparable systems which are the best and most powerful. The falun gong teachings on energy cultivation are very correct at a high level, and not known by many people.
http://www.threegeese.com/wildgoose.html
and
http://www.qinway.org
Once I downloaded a documetary off Kazaa that showed an old master would do standing on one finger with his feet very lightly resting on a wall. And after that, all night long non laying seated meditation. It said the old master died and no one left today can do only one finger.
Buddy and wannabe experts STFU