Lau Bun is from the same area as Jimmy and maybe trained in the same school, he is in our lineage book. I found this video which is very interesting and appears very accurate with what I know. Jimmy used to visit Lau Bun’s studio, this was told to me by Wally Jay (Small circle Ju Jitsu) who saw him there. When they discuss Lau Bun was security for the Hung Sing club in LA and left for San Francisco Jimmy took over his job in LA. Also note that a couple of photo’s where Lou Bun poses he uses the middle extended knuckles (Dragon Fist). Good feeling to have what we know confirmed.