The Chen family-style (陳家、陳氏、陳式 太極拳) or Chen-style Taijiquan is a Northern Chinese martial art and the original form of Taiji. Chen-style is characterized by silk reeling (纏絲勁; chán sī jìn), alternating fast and slow motions, and bursts of power (發勁; fa jin). Traditionally, Taijiquan is practiced as a martial art but has expanded into other domains of practice such as health or performances. Some argue that Chen Style Taijiquan has preserved and emphasized the martial efficacy to a greater extent. History Origin theories As for the origin and nature of modern Chen-style taijiquan, documents from the 17th century indicate the Chen clan settled in Chenjiagou (Chen Village, 陳家溝), Henan province, in the 13th century and reveal the defining contribution of Chen Wangting (陈王庭; 1580–1660). It is therefore not clear how the Chen family actually came to practise their unique martial style and contradictory "histories" abound. What is known is that the other four contemporary traditional Taijiquan styles (Yang, Sun, Wu and Wu (Hao)) trace their teachings back to Chen village in the early 1800s. Chen Village (Chenjiagou) According to Chen Village family history, 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 Hong Dong (洪洞), Shanxi (山西). Chen Bu, considered to be the founder of the village, moved from Shanxi to Wen County (溫县), Henan Province (河南) 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. For generations onwards, the Chen Village was known for their martial arts. The special nature of Tai Chi Chuan practice was attributed to the ninth generation Chen Village leader, Chen Wangting (陳王廷; 陈王庭; 1580–1660). He codified pre-existing Chen training practice into a corpus of seven routines. This included five routines of tai chi chuan (太極拳五路), 108 form Long Fist (一百零八勢長拳) and a more rigorous routine known as Cannon Fist (炮捶一路). Chen Wangting integrated different elements of Chinese philosophy into the martial arts training to create a new approach that we now recognize as the Internal martial arts. He added the principles of Yin-Yang theory (阴阳; the universal principle of complementary opposites), the techniques of Daoyin (leading