The lighting in the private room was quite dim, so even if Lan Jin had taken off her mask right then, it's likely she wouldn't have been recognized unless someone got up close.
Furthermore, the hood of her oversized hoodie covered her whole head, and as she was eating with her head down, even Rong Ni didn't recognize her at first and only felt a sense of familiarity.
Zhen Muqing, who was sitting closer to her, seemed to recognize her but still wasn't sure, as she felt the outfit of Emperor J somewhat resembled Mu Zhijin's from last time, and she knew Mu Zhijin was Lan Jin.
So...
Impossible!
Zhen Muqing instinctively rejected the idea. How could Emperor J possibly be that wretched Lan Jin?
But then, when she thought about the voice she'd just heard...
Upon closer consideration, it did sound somewhat like Lan Jin's.
