April 6, 2013 FPGM chang moo kwan kwon bop kong soo do April 6, 2013 FPGM chang moo kwan Before suggesting that his style be renamed Chang Moo Kwan Do, Sensei Byung-in Yoon taught what he termed Kwon Bop Kong Soo Do at the Seoul, YMCA in the 1940's . . .