Hi there,
I’ve got here about 30 xiaomi devices in my appartement and I’m connected through the chinese mainland server currently, although I’m in Germany.
Nethertheless, I just wanted to add 4 additional Yeelight W1 dimmeble GU10 bulbs and here’s what is curious:
2 of 4 bulbs were found after fresh reset and could be added right into the app.
the other 2 can’t be find. several resets later tried to switch to German server to check if I can find them there: and HELLO - flawless connection on first try.
after switching MiHome app to EU server - same. GU10 found just fine.
GU10 on chinese server (even those 2, which are in the yeelight app) won’t be shown there - so any automation is obsolete here. 
switching everything to EU server would be a headache. any solutions from YeeLight?!
Kind regards Lukas