Su Yang didn't dare to mention his plan to return to the Nine Realms because these people were too rude, seizing him and starting to falsely accuse him. These individuals probably weren't good people either, so naturally, Su Yang didn't dare to reveal anything about the Nine Realms, lest he brings trouble to the Nine Realms.
Moreover, Su Yang had just overheard that this person mentioned they were from the Heavenly War Alliance.
Su Yang had encountered people from the Heavenly War Alliance before, specifically, that man from the Holy Martial Realm. The arrogance and mocking attitude of that man, looking down on others, was still vivid in Su Yang's memory. Therefore, Su Yang didn't have a good impression of the Heavenly War Alliance.
