The Chinese language description states that Seisan Kata derives from a 'Form' found within the 'Incense Shop Fist' (香店拳 - Xiang Dian Quan) Style. Xiangdian is a district in Fuzhou City, Fujian province. This is one of the thousands of lineages completely uneffected by the political changes in China - and which has been falsely recorded in the West as 'being wiped out', etc. This is the Chinese language encyclopaedia page:
'香店拳源于清乾隆年间。南少林武僧智远为报香店人救命之恩，在此密传罗汉拳，隐名为“香店拳”。后经香店历代拳师吸取各派精华，形成了独特的香店拳，并流传于海内外。  香店拳是内外合一、硬气功兼练的技法拳种，分上、中、下三盘，善于短打近攻。武术套路有硬三战、三战等十多种套路，甚为独特。'
'Incense Shop Fist (香店拳 - Xiang Dian Quan) originated during the Qianlong period of the Qing Dynasty (1735-1796). The Southern Shaolin Temple Warrior-Monk named 'Zhiyuan' (智远) - in order to save the lives of the people living in the 'Xiangdian' area of Fuzhou City - secretly conveyed to them the techniques retained within the Shaolin gongfu Style known as Luohan Fist (罗汉拳 - Luo Han Quan). As he wanted to keep this interaction 'secret' - Zhiyuan referred to this Style as being called 'Xiangdian Fist' - giving the impression it was a local form of fighting already known by the people. As time progressed, however, Zhiyuan integrated (and absorbed) the essence of many other (different) gongfu arts and slowly the 'Xiangdian Fist' started to evolve - becoming very different from Luohan Fist. The effectiveness of this Style became famous and it was spread throughout China and abroad. Xiangdian Fist incorporates the unity of the 'internal' and 'external' (内外合一 - Nei Wai He Ye) and 'firm' qigong (硬气功 - Ying Qi Gong), etc. All this ability is manifested simultaneously in the mind and body of an advanced practitioner. The opponent is peppered with close-in and short-range (very powerful) techniques delivered to the continuously varying heights of high, middle and low. There are at least ten different and unique 'Forms' - including a 'firm' (hard) version of 'San Zhan' (三战) or 'Three Battles'.'
A well-known Xiangdian Fist Master today is 'Yan Mengyong' (严孟永) [b. 1950] who started training with his uncle - Fang Ligui (房利贵) - in 1968. In November 1978, he was invited to participate in the First Wushu Observation and Performance Conference in Fujian Province with his master - Fang Ligui - and won an award. Since then, Master Yan Mengyong has taught Disciples from all over China - with his gongfu spreading to Hong Kong, Singapore, the United States - as well as many other places!
Shifu Adrian Chan-Wyles (b. 1967) - Lineage (Generational) Inheritor of the Ch'an Dao Hakka Gongfu System.