I tried yesterday, but it's useless... So, I don't think it's the problem of the access properties, should be coding frauts. Because the log files of discuz bbs are all readable. Are you sure that both of DZ and XS are using the same way to create log files?
i am sorry, do not have chinese inputs here. i gotta update this question in chinese after i back home if you want.
yes, i'm pretty sure about that. because the values in the files had been modified. but what the problem is, or maybe, some of the oversea hosting servers can not recognize the characters in the log file generated by XS. so, the values on index of user space will be never changed.