What is the relationship between Taijiquan and martial arts?

Taijiquan is also a martial art, taijiquan's predecessor is the Tongbei Quan, Chen Wangting will be the ancestral Tongbei Quan as well as other sects of the strengths and the theory of taijiquan combined together to form taijiquan, don't think that taijiquan is soft and not hard in fact, taijiquan is to use force, but taijiquan's force from the waist with a kind of spring force, taijiquan there are a lot of kinds of fast, there are some slow, there are some soft more than just a small, there are just more than soft less. more soft less, taijiquan has three stages first practicing boxing second push hands third sparring visible taijiquan is more and more practice faster and faster practice to sparring purely technical speed is very fast