C44 The History of Ji Tiancheng
If it was the second scenario, then it would be alright. In any case, he was currently in the Ji family, so he would definitely be able to find some clues if he slowly investigated. However, if it was the first case, and if there was a Xuanyuan bloodline in this world, then it would be difficult to say.
Putting aside the difficulty of finding him, just based on the current situation