why expect make the Chinese code garbled

Hi all,

I use expect scripts in gnome-terminal to login a bbs

=============================
#!/usr/bin/expect
set user [lindex $argv 0]
spawn ssh $user@asite

interact timeout 160 {send "jk"}
exit
============================

The bbs site is Chinese character, if I just use ssh command, Chinese
character is readable, but if I use expect scripts, it make Chinese
character garbled. I read the expect manual page, there is no anything
about charset. what can I do?

thanks!

Jason
.

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