Siku Quanshu requires EZproxy 4.0a GA (2006-08-02) or later.
Since libraries install their own copies of Siku Quanshu on their own servers, there is no single, correct definition for this database. The general configuration is:
Title Siku Quanshu
replacing both instances of skqs.yourlib.org with the name of your Siku Quanshu server.