Although the theory of yin and yang (Tai chi ) is a few thousand years old and as a concept has been applied to everything from traditional Chinese medicine,Taoism,Feng Shui ,etc, the actual martial art we know as Tai Chi Chuan (Taijiquan) was formulated a few hundred years ago by the Chen family in Henan Province which is today famous for its martial arts schools and is also the birthplace of Shaolin Gongfu.
There are said to be up to 10,000 martial arts schools in Henan alone making it the mecca of Chinese martial arts.Here is the story of how Tai Chi Chuan began with a family called Chen.
Chen Bu (陳仆; 陈卜) was a skilled martial artist who started the martial arts tradition within Chen Village. The Chen family were originally from Shanxi, Hong Dong (山西洪洞). Chen Bu, considered to be the founder of the village, moved from Shanxi to Wen County, Henan Province (河南溫县) in 1374.
The new area was originally known as Chang Yang Cun (常陽村) or Sunshine village and grew to include a large number of Chen descendants. Because of the three deep ravines (Gou) beside the village it came to be known as Chen Jia Gou (陳家溝) or Chen Family creek/brook.