I can't really tell, as I never read Chu Liu Xiang novels.. the masked Simon was just one of the many plot devices which you just have to believe, I guess. I could never understand why people couldn't recognise Clark Kent as Superman, Prince Adam as He-Man or, closer to wuxia, Kwan Hoi San as LaoDao Bazi. All that effort to unmask him as Jade Priest when all he has to do is talk and you know exactly who he is.
I can't remember then Wong Wan Choi part at all.. I'll have to rewatch and then tell you. All I recall was that he eloped with Kwan Hoi San's daughter after that tragic body-swapping arc.