Over the years I've heard various different things about master Zhou Ting Jue who teaches a system sometimes called fire qigong. He is able to seemingly produce a lot of heat/qi from his hands
I have talked to some people who visited him personally and they each had different things to say about him.
Some say he's a fraud and some think he's real
Seemingly the most suspicious part of his system is when he treats patients he tends to use aluminum foil mixed with a liquid solution. He claims this helps the qi healing process. However we know that mixing a metal with certain basic solutions like lye can produce heat through a chemical reaction.