it used to be a rare style.

it was popularized during kuo shu guan era among civilian and military in China.

ma yin tu/ma feng tu introduced it into kuo shu guan curriculum

it was popularized among college students in taiwan via wu tan.

ma feng tu popularized the style in northwest of china.

it is now popular in japan only second to tai chee (CMA in Japan).

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na king central guo shu guan -> military,

wu tan -> taiwan college students---

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