shuāngshēngxiōngdì
ㄕㄨㄤ ㄕㄥ ㄒㄩㄥ ㄉㄧˋ
Simplified 双生兄弟
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 雙生兄弟 and it comes back until you know it.