This depends on the database you are using and the character set of the web site (among other things)...
Are you using SQL Server? Oracle? Something else?
What character set is the web site served in? What character set will the Chinese part be served in? While it is possible to serve the entire site using a Unicode character set, most sites choose to use a local character set for Asian viewers since a large chunk of the browsers in those markets don't support Unicode.
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