During the short-term contact, there were many rapid changes, there were many points which points out Liao Qiu was a meticulous person and is highly skilled in reading people. It really was not simple just based on his psychological analysis on Su Bai which was so thorough;
Perhaps when Su Bai had pretended to be a worker to tail them and was murdered by Lie Wugou from the shadows, Liao Qiu already knew he was not dead. That was why he deliberately ate some skewers and threw them on the ground to attract Su Bai over. The dead baby might have possibly been a dead baby from the start. Since the beginning, it was all a setup to allow Su Bai who was overconfident fall step by step into their trap.