Gu Zhiqi had guessed that the person was Jin Cenglv, but she didn't reveal the other's identity. She herself had also disguised and altered her voice, so Jin Cenglv likely didn't recognize her.
The two were not familiar with each other, and Gu Zhiqi had no intention of revealing her identity to Jin Cenglv. She merely tilted her head and looked at her, "You're here to rescue someone?"
Jin Cenglv didn't speak, remaining frozen for several seconds. After a few seconds, she belatedly nodded.
With Gu Zhiqi in disguise, Jin Cenglv indeed didn't recognize that the person before her was Master Zhezhi, whom she had met earlier, and she didn't make that connection at all.
When Gu Zhiqi acted just now, Jin Cenglv noticed it. She knew the other person was formidable, and that Gu Zhiqi had come with the Ever Winning Army.
Guessing that the other was also here to rescue someone, and knowing she was also here to rescue people, Jin Cenglv figured she wouldn't harm her, so she nodded.