Wànguóyóulián
ㄨㄢˋ ㄍㄨㄛˊ ㄧㄡˊ ㄌㄧㄢˊ
Simplified 万国邮联
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 萬國郵聯 and it comes back until you know it.