Yes, the people who pushed the girl down was wearing the same uniform as her.
Shen Tianyu watched as the girl tried to struggle back onto the bridge. Yet, despite it being so close, it was as if the girl had entered a whirlpool, she kept sinking further and further down into the depths. Even when she managed to grab onto the edge of the bridge, the force pulling her down was strong enough to cause her to release it. As fear became more vividly etched on her face, she was dragged downwards. However, even though her mouth was flapping open and closed as if yelling or screaming, no noise came from the still waters, not even her flailing caused any sound much less ripples. She noticed that there were also no bubbles forming from the breath rapidly escaping from the girl into the surrounding liquid. She was pulled further and further away, just like the cinnabar stick, until not even her head of black hair could be seen.