I submit my code at 9:13am( the time of my computer ), but the oj show me "23 Jan 2009 06:58", it's about 2.5 hours earlier.
  And if it is RU time, please tell me which city's time is it exactly ? ^_^ I am also interested in geography.
  Thanks.

(GMT +05:00) Ekaterinburg
What do you mean by "RU time"? In Russia there are different time zones (unlike China), so different territories have different times. Official "RU time" is Moscow time, which is (GMT +03:00)

Oh, I mean Russia time. Thanks, I got it now, and In China we also have different time zones( The official time is Beijing time ).

Hm, it's really new to me. I've met in the literature that in China there is one time zone. Is it old rule, or may be it is innovation?