Problem with Chinese today is that the Pinyin 形 and 心 are both Xing. People who are not familiar with this often confuse two very different systems known as 形意拳 and 心意拳.
A few problems with this passage.
QUOTE
(1620 - 1680) Although some transcripts attribute the Famous General Yue Wu Mu Wang (Yueh Fei) as the creator of Xingyiquan, most historical records can accurately point to Ji Long Feng (also known as Ji Ji Ke) as the person most likely to have created it during the early 1600s.
Legend has it that Ji found Yue's ancient boxing manual on Xingyiquan in a cave at Zhong Nan mountain. This would explain the 500 year lapse in the lineage line.
If we are still trying to paint Yue Fei as the founder the the 形意拳 system, a few things that we should take into account of this.
(1) This legend is tracing the system to the book named Xingyi-lihe-quanpu (心意六合拳譜) published in 1750 during the reign of Qianlong. What should be noted is that it did not say 形意拳, but just 意拳.
(2) No sources except for this book indicates Yue Fei's hand in the system. Nothing in Song texts, nothing in Jin or Yuen texts.
(3) Ji only attributed the system to Yue Fei. Problem about a culture like China where self-crediting is frowned upon, many people prefer to disguise their down credit by attributing it to someone else. This is mainly where most of the "wise man in mountain" myth came from. Not unlike how people try to attribute Tai Chi to mythical figures like Chen Sanfeng.
QUOTE
As legends have it, he was at the temple one day reading a book when he spied two roosters fighting. Their fight inspired him to study their characteristics and tactics further, and from his observations he perceived the true essence of fighting and began an assidious examination of animal characteristics. He called his new method the Xinyi Liuhe Quan - "Mind and Will Boxing of the Six Conformities."
Simple problem with this is that the figure in this legend is a different person altogether ! The name of this particular individual is 姬隆峰 in which certainly predated Ji Longbang (戴龍邦)
If we are trying to paint Ji as being the founder, then I would like to point out that the book at best shows that he was a practitioner of the system. Evidence of Xingyi-luhe can be traced to the reign of Yongzhen. Considering Xingyi-luhe is generally considered as a later developement of Xingyiba (心意把), this means that the history of this style can be traced even further back. More importantly, 形意拳 is actually considered an even later developement than Xingyi-luhe. The earliest founding of 形意拳 can be traced to mid 1800s by 李洛能. But even that can be disputed (I won't get into details)