C453 A Letter of Challenge

"Where did Zhang Bai go? We have already searched all the places we need to find, but there is no trace of him. Could it be that we have encountered some kind of danger?"

Zhang Bai didn't tell anyone about his whereabouts this time, so Ou Tian and the others naturally didn't know about his whereabouts. However, when they were looking for him, they found that he had already disappeared