liǎngguózhījiān
ㄌㄧㄤˇ ㄍㄨㄛˊ ㄓ ㄐㄧㄢ
Simplified 两国之间
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 兩國之間 and it comes back until you know it.