In Adobe® Illustrator®, if you use ink name or layer name with Chinese characters, you may like to keep them in your PDF file when open in other applications (e.g.: Adobe® Acrobat®, ArtPro+, PackEdge etc). How to do this?
Currently, if you just save the file as Adobe®PDF, when you view in Adobe® Acrobat® (e.g.: Output Preview) or other Esko applications, you will see that although the Chinese layer names are preserved, the ink names become "Global Color", "Global Color 1" etc.
You need to install the free Esko Data Exchange plugin to your Adobe® Illustrator®, see the following article for more information:
Just Export your file to Normalized PDF in Adobe® Illustrator®, both the layer names and ink names using Chinese characters will be preserved.
It is still possible that you don't see the Chinese characters correctly in some applications (e.g.: iPC, etc). You can try to change the (iPC) computer's Language for non-Unicode programs to Chinese (Control Panel > Region and Language > Administrative), restart the computer and it will show the layers correctly.
Same problem may occur with other languages (e.g.: Japanese, Korean, etc.,) and this workaround will help. But you need to choose the corresponding input locale.
DeskPack Plugins for Adobe® Illustrator® 14 and newer