I hope this question hasn't been asked a million times on here. I recall being told that the three original Mantis forms are Luanjie (chaotically connected), Bengbu (crash and fill in) and bazhou (eight elbows). I know that these forms are taught in Grand Ultimate Praying Mantis Boxing (Taiji Tang Lang Quan). Are they also taught in other systems of Praying Mantis boxing? Also, is Lanjie (intercept) derived from Luanjie, or are they totally unconnected? Thank you.