I plan to move this page to the main namespace.
Topic on Project:Village Pump
If I understand correctly, your help page is about installing MediaWiki on CentOS. The general consensus is to use the main installation guide instead of specifics for each OS. See Topic:Rvimulqxtsn7h23r.
Since CentOS is supposed to be compatible with Red Hat, I'd suggest to create it as a subpage of Manual:Running MediaWiki on Red Hat Linux, for example, Manual:Running MediaWiki on Red Hat Linux/zh.
My help page is especially to explain the installation of mediawiki in centos 7.2, not a general description.
I think that translating the existing content is better.