dǎkāihuàxiázi
ㄉㄚˇ ㄎㄞ ㄏㄨㄚˋ ㄒㄧㄚˊ ˙ㄗ
Simplified 打开话匣子
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 打開話匣子 and it comes back until you know it.