Bai Youquan tried to struggle, but discovered that he was powerless to free himself from Wang Ling's clutches. Actually, if this was an ordinary situation, Wang Ling could choose to forcefully search the other party's memories if they refused to answer the question. Unfortunately, he couldn't use this tactic with Bai Youquan.
Although Wang Ling had already taken Bai Youquan's Fate Dao, it still belonged to the latter. Once Fate Dao was used, Bai Youquan's mind space would turn into chaos as the memories of the Bai Youquans from all the other parallel worlds would be jumbled up like paste, and difficult to tell apart.
Wang Ling was in no hurry to interrogate Bai Youquan; he still had Odd Zhuo, after all – it was only right that this sort of menial task was left to his disciple.