If you've heard about these funky substances, perhaps you know
http://www.erowid.org?
Did a quick search and came up with:
interesting quote about xtc: (Saunders)
I have had several reports from people who have used Ecstasy while practising yoga and tai-chi besides one who has only taken Ecstasy while doing kung fu and yoga:
I was very aware of soothing warmth permeating my body. I began to put more energy into my form and experienced an increasingly heightened perception, reaching a peak after about 45 minutes. One of the major aspects that the E shed light on was the use of energy (prana/chi) rather than a focus on muscular strength. My overall impression of the benefits of E usage in Hatha Yoga was that the session overall had its own distinct harmony and produced a highly balanced mode of perception in which contradictions of body and mind were 'synthesised' into a very pleasant equilibrium. The insights gained from the session have been incorporated into my daily practice, so that now the sensations produced by the E can be reproduced by the yoga - rather like a free trip.
The effect of Ecstasy on Kung Fu was to make clear that the user, who was male, was good at the hard or yang movements but had neglected those that were soft or yin:
I found that the softer 'feminine' touch counterposed the external, physically athletic 'male' side of kung fu, the balance of the two working in harmony improved the speed, power and insight into a given technique to quite a considerable degree. . . though I am not sure I would wish to be challenged to a fight under the influence.
And a few more:
http://www.erowid.org/experiences/exp.php?ID=40012
http://www.erowid.org/experiences/exp.php?ID=25157
http://www.erowid.org/experiences/exp.php?ID=6520
So there appear to be some people with awareness of both qi and entheogens, but what they really know about either remains a question... a lot of people interested in these things are so only while in college and tend to like anything mystical and see qi as the Force from Star Wars. Not that I know anything about qi or drugs, that's just an observation.
Lot's of related topics like peyote religion, ayahuasca, Alan Watts, Huxley...
Perhaps a more thorough search will yield something more interesting. Or you could try and ask them:
http://www.erowid.org/ask/ask.cgi?Action=AskQuestion , very friendly people.
You could also try and make some online Chinese friends and have them search the internet in Chinese.
Nice little commercial for the War on Drugs by the way