Update zh_CN, thanks to yidong

language/zh_CN/admin.lang.php

@@ -1222,4 +1222,31 @@ $lang['right now'] = '立刻';
 $lang['since the beginning'] = '从开始';
 $lang['Album search tool'] = '相册搜索工具';
 $lang['Activated'] = '已激活';
-$lang[' (copy)'] = '复制';
+$lang[' (copy)'] = '复制';
+$lang['Group(s) \{%s1\} succesfully merged into "%s2"'] = '把 %s1 已成功合并到 %s2';
+$lang['Filters'] = '筛选';
+$lang['Generate random password'] = '生成随机密码';
+$lang['Group "%s" succesfully deleted'] = '%s 组已成功删除';
+$lang['Group added'] = '已添加';
+$lang['Group renamed'] = '已重命名';
+$lang['Groups \{%s\} succesfully deleted'] = '%s 已成功删除';
+$lang['Has access to administration. Can only manage content: photos/albums/users/tags/groups.'] = '已进入管理中心，可以管理相册，图片，用户，标签，组。';
+$lang['Has access to all administration functionnalities. Can manage both configuration and content.'] = '已成功进入所有管理功能，可以配置和管理。';
+$lang['Install Piwigo on mobile'] = '在手机上安装Piwigo';
+$lang['Installed on %s, %s'] = '在 %s 上安装，%s';
+$lang['Keep them'] = '保持';
+$lang['Last revision date is newer than'] = '上一次的修改是最新的';
+$lang['Activity peak in the last weeks'] = '过去几周访问高峰';
+$lang['Can be shared by several individuals without conflict (they cannot change the password).'] = '可以分享给不同的人不存在问题';
+$lang['Choose which tag to merge these tags into'] = '选择某个标签合并到其它标签';
+$lang['Clear Selection'] = '清除选择';
+$lang['Create a new album at root'] = '在根目录新建相册';
+$lang['Create a sub-album of "%s"'] = '在 %s 下新建子相册';
+$lang['Delete them'] = '删除';
+$lang['Discover'] = '发现';
+$lang['Display'] = '显示';
+$lang['Displays a banner to install or open the official Piwigo app'] = '显示图片去安装或打开Piwigo的APP';
+$lang['Dissociate user from this group'] = '从这组分离用户';
+$lang['Edit guest user'] = '编辑外部用户';
+$lang['Error when trying to detect formats'] = '在检测格式时存在错误';
+$lang['Extensions'] = '应用扩展';