Made it such that description will still be returned even if null as an empty string in /class/read.
Made it such that description will still be returned even if null as an empty string in /class/read.

hongsudt/server,HaiJiaoXinHeng/server-1,hongsudt/server,HaiJiaoXinHeng/server-1,hongsudt/server,HaiJiaoXinHeng/server-1