There were so many questions, and Fang Zhengzhi knew that these questions were very likely the key to solving the mystery of Yu Er's disappearance.
There were so many questions in his mind that he furrowed his brows, but he could never obtain the answer to some of the questions.
For example, how did the Yan Cloud Cavalry fight the war at Ten Mile Lake? How did they die? How heavy were the Demon's and Monster's losses?
Was there anyone who knew the answers to these questions?
Without witnessing the war, no one could possibly know about these details. In that case, he could only identify the critical issues amongst all the questions and deduce the truth.
That made things much easier.