1. For Sametime to show chinese character
"Regional and Laugage Options" --> "Advanced" --> "Language for non-Unicode programs"--> "Chinese (Taiwan)"

2.For ES in Websphere
"Regional and Laugage Options" --> "Regional Options" --> "Standards and formats" --> "English (United States)"

3.For DB2 Configuration Assistant
"Regional and Laugage Options" --> "Advanced" --> "Language for non-Unicode programs"--> "Chinese (Taiwan)/English (United States)"
"db2jds.exe problem" will be happened while the language is "Chinese (Hong Kong S.A.R.)"