add Simplified Chinese translations

AUTHORS.rst

@@ -46,3 +46,4 @@
 | Radosław Jan Ganczarek <radoslaw@ganczarek.in>
 | Lucas Wiman <lucas.wiman@gmail.com>
 | Jack Cushman <jcushman@law.harvard.edu>
+| Zach Cheung <kuroro.zhang@gmail.com>

CHANGES.rst

@@ -6,6 +6,7 @@ master (unreleased)
 - Fix handling of deferred attributes on Django 1.10+, fixes GH-278
 - Fix `FieldTracker.has_changed()` and `FieldTracker.previous()` to return
   correct responses for deferred fields.
+- Add Simplified Chinese translations.
 
 3.1.2 (2018.05.09)
 ------------------

model_utils/locale/zh_Hans/LC_MESSAGES/django.po

@@ -0,0 +1,41 @@
+# This file is distributed under the same license as the django-model-utils package.
+#
+# Translators:
+# Zach Cheung <kuroro.zhang@gmail.com>, 2018.
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-10-23 15:12+0800\n"
+"PO-Revision-Date: 2018-10-23 15:26+0800\n"
+"Last-Translator: Zach Cheung <kuroro.zhang@gmail.com>\n"
+"Language-Team: \n"
+"Language: zh_CN\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+
+#: models.py:24
+msgid "created"
+msgstr "创建时间"
+
+#: models.py:25
+msgid "modified"
+msgstr "修改时间"
+
+#: models.py:37
+msgid "start"
+msgstr "开始时间"
+
+#: models.py:38
+msgid "end"
+msgstr "结束时间"
+
+#: models.py:53
+msgid "status"
+msgstr "状态"
+
+#: models.py:54
+msgid "status changed"
+msgstr "状态修改时间"