Three years ago , after allegedly calling himself a master in certain methods , the committee on acupuncture wrote a letter of warning saying it was a violation “ to make claims of professional superiority that you cannot substantiate 针灸委员会对谭氏发出警告的公函,指他违例冠上不能被证实的专业职称,以使他人相信自己专业上胜人一筹。