building strength for the chinese flag...

I been wanting to try out the Chinese flag... or flag pole I guess its called. what are some things that I can do to build my strength for that... I guess if I build my core strength a lot right? I'm guessing if I can do this it will help me do areial inverts better, twisted grip and this combo I love so much... shoulder mount into flag pole combo.. dose the bottom elbow kind of go into the hip to hold and balance you up ? Anything will help. Thanks 🙂