Yeah, I think he's seeing a lot of potential and similarities so he keeps pushing to see where exactly Zhao Yunlan's current lines are. Because I think he can tell there's differences, so he's trying to work out what they are, exactly?

Yes, I think so too.
I was also wondering when exactly Shen Wei figures out that Kunlun's weapon was a modern firearm.
Is he coming at this already expecting Kunlun to be a time-traveller?