[ Communicators...computers...refrigerators?! What is a droid?? So many words that he's never even heard of before are coming out of this person's mouth. ]

I'm not familiar with any of those terms but ports and ships were Liyue's life and blood. But perhaps the reasoning for their closed nature is due to the fact that they themselves are unaware of the realms outside of this. Or perhaps there are inner workings that are preventing such instances from happening. It seems that there is a bit of rivalry between all factions, without order or balance one cannot hope to achieve a perfect working city.