Just my 2 cents: it looks like a Morat piece of armor to me (Raktorak/Rodok maybe?). Edit: Chest front part, to be more precise.
I feel that would be largely unnecessary for someone who punches as hard as a pistol and can princess carry a Yan Huo.
Hang a JSA model left over from the Uprising on the fist by its shirt collar. That Crane always looked especially psychotic to me. Or maybe give it a Jade Emperor body pillow to hold close to its heart? That pose looks like endless comedy opportunities to me.
Honestly, if I had the skills, mats and tools... I'd rotate the fist around and hand him a parchment, so he may zealously accuse the enemies of the Emperor of their heinous crimes.
I'd be inclined to have mine dangling a pair of high-tech handcuffs from that clenched fist. Because dead or alive, you are coming with him.
If you have a licence to do it, and it results in fewer treacherous non-citizens in the world, then was it ever really a war-crime?
Only losers get taken to Nuremberg and the glorious YJ empire will never know defeat, so I bite my thumb, sir.