When selecting print, it has 3 options:
1. System Print Service – It will use the print service from the printer supplier to print the content.
2. Cloud print - Here is the user manual from WPS regarding how to print files for cloud print: http://www.kingsoftstore.com/support-for-android-office/3077-how-to-print-office-files-in-android-with-cloud-print.html
3. Postscript – it will convert the doc to .ps or pdf file and user can print it remotely.
As method 1 normally needs to install the supplier's print service APP which may have compatible issue, it is suggested to use the cloud print option.