Luo Kangqi was teaching fachi in Bangkok years ago at his clinic. He has a special technique to recharge the dantian with a battery. Constantino Valente, David Verdesi and others studied with him at one point
Here is a brief biography of master Luo Kangqi if you scroll midway down the page, his materials and some of his methods are used by Constantino Valente's school (NeiQigong) as he was one of Constantinos instructors.
I have not seen much information regarding Luo Kangqi's school other than it was a taoist sect from Guangdong called
Here is a brief biography of master Luo Kangqi if you scroll midway down the page, his materials and some of his methods are used by Constantino Valente's school (NeiQigong) as he was one of Constantinos instructors.
https://www.neiqigongjiaoshiandrea.com/masters