It will be interesting to see the possibilities of the pairing, however, I wonder how a rifle with conventional layout would affect the shield-rifle pairing... since the bullpup would offer better balance
Interesting question. Bullpups being more centered on weight distribution would definitely work better than a conventional rifle. But there is no way either setup can reload with a shield.
I think it's more of showing off an opportunity than a real doctrine. First guy in got a shield and way more firing power with a auto rifle instead of a pistol. They don't actually know what they can do with the armor yet.
Also considering China's got millions of 097s they probably just grabbed one to show off. Even if they do adopt this setup in future, there will still be plenty of 97s sitting around for the rare case they decide to go with this.