This post only describes how to modify USU5 PRO to accept Chinese characters in the URI.
If you have any other problems when using USU5 or USU5 PRO, please go to following topic.
In Usu_Validator::validate() function, it will compare the 'incoming seo uri' and 'new seo uri', it will fail to go to desired page if thry are different. However, the encoded 'incoming seo uri' always different to decoded 'new seo uri' when URLs has Chinese. To solve this problem, you could simply add urldecode function when setting 'incoming seo uri'.