Confirmed that Yin server login is down. I got disconnected twice this morning, and on the second time, I could not log back in. Even the forums is loading sluggishly for some reason.
Well, after many attempts, I have managed to login to hefei, but skills are missing, bags are empty, character screen is missing all equipped gear, and hefei map appears empty. There have been intermittent "flashes" of stands and people appearing in hefei for 2-3 seconds and disappearing again too.
After a disconnect, I have managed to login smoothly, and it appears that the problem is not affecting everyone. There are preexisting stands and afk characters in hefei. Strange.