The other thing I found noteworthy while rewatching this was that Shen Wei is really a little... reckless... in how easily he gives away what his biggest liability (Zhao Yunlan) is. It seems terrible strategy to on the one hand say, 'I can't tell this guy I love who I really am because it might put him in danger', but then paint a HUGE TARGET on him by telling the currently-main villain du jour that the villain is absolutely not allowed to touch him. I mean, I love you, Shen Wei honey, but that was not good self-control!

I've been developing a theory about this after re-watching. Once he recognizes Kun Lun he absolutely intends to stay close to him (because of spoilers plot, timeline, hallows have disappeared etc.) and everything is starting to come together. I think it's Shen Wei's strategy to keep people (Ye Zun) from wondering why he is so interested in Zhao Yun Lan. 

It's a great cover because it's true, (especially useful against people who might be able to read your mind just by touching something you recently touched etc.). 

This works well for the major secrets Shen Wei is keeping later, no one really questions why he keeps making what seem like crazy choices - including Ye Zun. 

Anyway I will have to do more re watching to see if my unified Shen Wei theory holds up. :))