"Professor Chu, when did you enter Netherworld City?" Zhou Wen asked directly.
If this Chu He was really Professor Chu He from Imperial Capital College, then the Professor Chu He who went to Zhuolu was likely a fake.
However, since the imposter hadn't been discovered, this meant that Professor Chu He must have come to the desert a long time ago. That was why no one had seen him again. Otherwise, the imposter would have been discovered long ago.
In that case, Professor Chu He should have entered Netherworld City a while ago. Otherwise, he would definitely have made contact with the outside world. Someone outside should know that he was in the desert and not Zhuolu.
However, the truth was that no one knew of such a situation. Even Chu He's family believed that he was in Zhuolu. This was extremely odd.