Unhappy [Q] Can't find my device in Web Google Play

I can't find my Nexus 5 in Web Google Play after i flashed a new ROM with rooted and a TWRP Recovery,it's just list some former device i used,of course,i signed in with my google account on my device,and i can use Google Play APP normally.Why it happened and what to do fix it?

BTW:I'm in China but my device system language is English,any correlation about this?

Merry Christmas for anyone who read this thread.