C3229 Evil Dragon Lane
Because of Jiang Ting's question, the girl was able to tell from his words that Jiang Ting was most likely a disciple of the Purple Frost Sect or the Demon Refining Pavilion.
As for why she didn't guess the Autumn Water Pavilion, The Autumn Water Pavilion only had girls. Although Jiang Ting had concealed his aura and his true appearance, However, the way the male and female acted were different