<P> Today, tai chi has spread worldwide . Most modern styles of tai chi trace their development to at least one of the five traditional schools: Chen, Yang, Wu (Hao), Wu and Sun . All of the former, in turn, trace their historical origins to Chen Village . </P> <P> The concept of the taiji ("supreme ultimate"), in contrast with wuji ("without ultimate"), appears in both Taoist and Confucian Chinese philosophy, where it represents the fusion or mother of yin and yang into a single ultimate, represented by the taijitu symbol . Tàijíquán theory and practice evolved in agreement with many Chinese philosophical principles, including those of Taoism and Confucianism . </P> <P> Tàijíquán training involves five elements, taolu (solo hand and weapons routines / forms), neigong and qigong (breathing, movement and awareness exercises and meditation), tuishou (response drills) and sanshou (self defence techniques). While tàijíquán is typified by some for its slow movements, many styles (including the three most popular: Yang, Wu and Chen) have secondary forms with faster pace . Some traditional schools teach partner exercises known as tuishou ("pushing hands"), and martial applications of the postures of different forms (taolu). </P> <P> In China, tàijíquán is categorized under the Wudang grouping of Chinese martial arts--that is, the arts applied with internal power . Although the term Wudang suggests these arts originated in the Wudang Mountains, it is simply used to distinguish the skills, theories and applications of neijia (internal arts) from those of the Shaolin grouping, or waijia (hard or external) styles . </P>

What is the most popular style of tai chi
find me the text answering this question