Tong Qing was one of Fang Shaokang's men, so Zheng Tan didn't hide his actions from him. Fang had told him they would see a lot of each other in the future, so he wanted Tong Qing to get to used to him.
He checked Tong Qing's face in the mirror when he was fixing the fur on top of his head. The man was too quiet, so seeing his expression change gave Zheng Tan a lot of pleasure. Thankfully, Tong Qing was not like Long Qi and managed to recover his composure shortly.
Zheng Tan turned around after fixing his fur and waited for Tong Qing to say what he brought him to say. Zheng Tan was not stupid, he had been watching Tong Qing ever since they entered the washroom. By the looks of it, Fang had something he wanted Tong Qing to tell him.
Tong Qing took a deep breath, though it was weird to do so in the washroom. The black cat was sitting on the sink and watching him calmly like he knew he had something to tell him.