Gen/Chai (Sai) are often thought of as being a Okinawan weapon but are often found in styles from the Fukien/Fujian province.
Hasayfu Hung Kuen - Double Gen (Chinese Sai)
http://www.youtube.com/watch?v=0HPiQBhwajg
Fukien Wing Chun White Crane "Horse Leading Rods"
http://www.youtube.com/watch?v=V386Mu89ue8
Ngo Cho Kun
http://www.youtube.com/watch?v=tgRnGJuY0tk
Somewhere there is a clip of one of the YMAA sai forms but I can't find it, if anyone knows where it is can you post it please.