Jing Xiu pressed Christina down onto the desk and Zhou Bai said, "You should let someone finish speaking. Act normal for a bit later. Everyone knows I keep a cat."
Although Zhou Bai often took Christina with him and concealed her in his sea of consciousness when they went out, he never hid her presence in the room. He simply told others that he liked to keep a cat.
As long as he connected his Primordial Spirit power with Christina, they could communicate with each other through their consciousness, just like how Christina was in her own sea of consciousness.
Christina: "Tch." She lay on the desk, squinting her eyes in the direction of the door.
Zhou Bai, controlling the power of the Primordial Spirit, opened the door, which also served to protect himself.
After all, having recently experienced the Heavenly Demon incident, Zhou Bai was still maintaining a high level of vigilance.