xiāngduìmìdù
ㄒㄧㄤ ㄉㄨㄟˋ ㄇㄧˋ ㄉㄨˋ
Simplified 相对密度
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 相對密度 and it comes back until you know it.