1. You need to have Chinese font on the printer, use Zebra font downloader application to install.
2. The is a sample code to print Chinese characters:
^XA ^CI28 ^A@N,50,50,E:SIMSUN.FNT ^FO50,110^FDChinese 中文字符^FS ^XZ
Another format can be:
^XA ^CI28 ^CWA,E:SIMSUN.FNT ^FO240,30^AAN,36,36^FDChinese 中文字符^FS ^XZ
Use CW command to change font, so that you need only to specify the font for all the content.
Hope it helps.