In the beginning of last century, there were many Kuoshu guan in Shang Dong.
Kuoshu guan gathered all the well known martial arts practitioners as teachers. They exchanged info and formulated training curriculum for the students.
The students needed to take tests to admit with a reference letter.
Kuoshu guan was tightly related to military or police academy. Most students would be officers in the army.
Ba Ji was introduced into the Kuoshu guan. And styles of Mantis were most popular in Shan Dong Kuoshu guan.
Thanks for posting the TV documentary.