the actual answer is that he put two years worth of chat logs through a microanalysis wringer to get the tiniest details on Jin Kang’s life and then worked up from there
You scare me.
Yiyeon should scare you lol I just read about what he did.
Logically speaking though…they’re both hackers so it’s not unreasonable for Jin Kang to ask how Yiyeon knew where he was after lrot had purposefully dropped off the grid to shake VX off. You can be the best hacker in the world but that doesn’t mean shit if someone’s keeping off the network in the first place. Moreover, Jin Kang is also good at what he does and keeping your location obscured is like the basic of basics…
Is he a silly baka....HE KNOWS CUS HES A GODDAMN HACKER!!!!!!!!!!!!