History
History of Changquan
The core of Changquan/Long Fist was developed in the 10thcentury by Zhao Kuangyin, founding Emperor of the Song Dynasty (960–1279). His style was called Tàizǔ Chángquán, which means "the Long Fist style of Emperor Taizu." In semi-legendary "classic" writings transmitted by Taijiquan's Yang family, their martial art is referred to by the name Chángquán in one of the received texts. These texts can only be reliably dated to the second half of the 19th century. 

History of Taijiquan
A Taoist Monk named Zhang San Feng of the 13th Century was said to have created Tai Chi Boxing in the Purple Summit Temple on Wudang Mountain. It is said he witnessed a fight between a snake and a crane and this inspired him to create Tai Chi Chuan.
Then Chen Family Tai Chi Chuan was taught to Yang Lu Chan who created Yang style Taijiquan, who then taught Wu Yu Xiang who created Wu style Tai Chi Chuan. Taijiquan was then still passed down from Wu and Yang Lu Chan’s sons and several other styles of Tai Chi Boxing were developed, including Hao, Sun, Li, Zhaobao Styles of Taijiquan. The words Taijiquan mean Supreme Ultimate Fist / Boxing.