dìxiàtiělù
ㄉㄧˋ ㄒㄧㄚˋ ㄊㄧㄝˇ ㄌㄨˋ
Simplified 地下铁路
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 地下鐵路 and it comes back until you know it.