Although there usually are no plurals in chinese, there's an exception

for words related to persons, when not preceeded by a numeric word.

Sources:
- http://localization-guide.readthedocs.org/en/latest/l10n/pluralforms.html#f3
- https://answers.yahoo.com/question/index?qid=20110606153553AAAW5zX

js/zerobin.js

@@ -363,6 +363,7 @@ $(function() {
             switch (this.language)
             {
                 case 'fr':
+                case 'zh':
                     return (n > 1 ? 1 : 0);
                 case 'pl':
                     return (n == 1 ? 0 : n%10 >= 2 && n %10 <=4 && (n%100 < 10 || n%100 >= 20) ? 1 : 2);

lib/i18n.php

@@ -303,6 +303,7 @@ class i18n
     {
         switch (self::$_language) {
             case 'fr':
+            case 'zh':
                 return ($n > 1 ? 1 : 0);
             case 'pl':
                 return ($n == 1 ? 0 : $n%10 >= 2 && $n %10 <=4 && ($n%100 < 10 || $n%100 >= 20) ? 1 : 2);