thanks dickson for reminding me about the rule. actually i know it all because i have been visiting to this site for more than 2 years. i am this site's old fan. and i know Dickson is the "posting king". there were so many times i would like to reply to you guys, however, i couldn't type in chinese, then i say forget it. but now, i think it doesn't matter whehter it's chinese or english. it's nice to talk to you guys here. but i have to beware now, since someone is mean here.