Black Flag Wing Chun 18 San Sik contains 18 combat points and application. In one of other lineage/line of Wing Chun that use San Sik / Separate Hands as one the the training is Leung Jan Wing Chun [Gulao Wing Chun].
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All Wing Chun lineage are good. It is the practitioner personal training that determine how much skills the person has. Differences bring color depth and richness within Wing Chun and Kung Fu Family....
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Sifu Kenneth Lin
Wu Lin Yi Jia
"In Martial Arts Forest, It's One Family"