liǎngcèduìchèn
ㄌㄧㄤˇ ㄘㄜˋ ㄉㄨㄟˋ ㄔㄣˋ
Simplified 两侧对称
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 兩側對稱 and it comes back until you know it.