Chinese

		one; 1; single one; 1; single; a; (before verbs) as soon as, once; (before a noun) entire (family, etc.)	day; sun; date day; sun; date; day of the month; Japan (abbrev.)	one thousand li
simp. and trad. (一日千里)		一	日	千里

Idiom

一日千里

1. to make tremendous progress