diff --git a/config/config.php b/config/config.php
index 22a08b57a1..149c92900b 100644
--- a/config/config.php
+++ b/config/config.php
@@ -16,7 +16,7 @@ if(!class_exists('config')){class config{}}
 if(!function_exists('getWebRoot')){function getWebRoot(){}}
 
 /* 基本设置。Basic settings. */
-$config->version       = '15.0.rc1';         // ZenTaoPHP的版本。 The version of ZenTaoPHP. Don't change it.
+$config->version       = '15.0.rc2';           // ZenTaoPHP的版本。 The version of ZenTaoPHP. Don't change it.
 $config->charset       = 'UTF-8';              // ZenTaoPHP的编码。 The encoding of ZenTaoPHP.
 $config->cookieLife    = time() + 2592000;     // Cookie的生存时间。The cookie life time.
 $config->timezone      = 'Asia/Shanghai';      // 时区设置。        The time zone setting, for more see http://www.php.net/manual/en/timezones.php.
diff --git a/module/misc/lang/de.php b/module/misc/lang/de.php
index 2f4dac3055..0127d934ac 100644
--- a/module/misc/lang/de.php
+++ b/module/misc/lang/de.php
@@ -84,6 +84,8 @@ $lang->misc->feature = new stdclass();
 $lang->misc->feature->lastest  = 'Letzte Version';
 $lang->misc->feature->detailed = 'Details';
 
+$lang->misc->releaseDate['15.0.rc2']    = '2021-04-09';
+$lang->misc->releaseDate['15.0.rc1']    = '2021-04-05';
 $lang->misc->releaseDate['12.5.3']      = '2021-01-06';
 $lang->misc->releaseDate['12.5.2']      = '2020-12-18';
 $lang->misc->releaseDate['12.5.1']      = '2020-11-30';
@@ -138,6 +140,8 @@ $lang->misc->releaseDate['7.2.stable']  = '2015-05-22';
 $lang->misc->releaseDate['7.1.stable']  = '2015-03-07';
 $lang->misc->releaseDate['6.3.stable']  = '2014-11-07';
 
+$lang->misc->feature->all['15.0.rc2'][]    = array('title' => 'Fix Bug.', 'desc' => '');
+$lang->misc->feature->all['15.0.rc1'][]    = array('title' => 'Upgrade to 15,reframe menu, add program.', 'desc' => '');
 $lang->misc->feature->all['12.5.3'][]      = array('title' => 'Adjust annual data.', 'desc' => '');
 $lang->misc->feature->all['12.5.2'][]      = array('title' => 'Fix Bug', 'desc' => '');
 $lang->misc->feature->all['12.5.1'][]      = array('title' => 'Fix Bug', 'desc' => '');
diff --git a/module/misc/lang/en.php b/module/misc/lang/en.php
index 8bf4028bbc..bb1e093367 100644
--- a/module/misc/lang/en.php
+++ b/module/misc/lang/en.php
@@ -84,6 +84,8 @@ $lang->misc->feature = new stdclass();
 $lang->misc->feature->lastest  = 'Latest Version';
 $lang->misc->feature->detailed = 'Detail';
 
+$lang->misc->releaseDate['15.0.rc2']    = '2021-04-09';
+$lang->misc->releaseDate['15.0.rc1']    = '2021-04-05';
 $lang->misc->releaseDate['12.5.3']      = '2021-01-06';
 $lang->misc->releaseDate['12.5.2']      = '2020-12-18';
 $lang->misc->releaseDate['12.5.1']      = '2020-11-30';
@@ -138,6 +140,8 @@ $lang->misc->releaseDate['7.2.stable']  = '2015-05-22';
 $lang->misc->releaseDate['7.1.stable']  = '2015-03-07';
 $lang->misc->releaseDate['6.3.stable']  = '2014-11-07';
 
+$lang->misc->feature->all['15.0.rc2'][]    = array('title' => 'Fix Bug.', 'desc' => '');
+$lang->misc->feature->all['15.0.rc1'][]    = array('title' => 'Upgrade to 15,reframe menu, add program.', 'desc' => '');
 $lang->misc->feature->all['12.5.3'][]      = array('title' => 'Adjust annual data.', 'desc' => '');
 $lang->misc->feature->all['12.5.2'][]      = array('title' => 'Fix Bug', 'desc' => '');
 $lang->misc->feature->all['12.5.1'][]      = array('title' => 'Fix Bug', 'desc' => '');
diff --git a/module/misc/lang/fr.php b/module/misc/lang/fr.php
index 9e31fca34d..2d0458f56a 100644
--- a/module/misc/lang/fr.php
+++ b/module/misc/lang/fr.php
@@ -84,6 +84,8 @@ $lang->misc->feature = new stdclass();
 $lang->misc->feature->lastest  = 'Dernière Version';
 $lang->misc->feature->detailed = 'Détail';
 
+$lang->misc->releaseDate['15.0.rc2']    = '2021-04-09';
+$lang->misc->releaseDate['15.0.rc1']    = '2021-04-05';
 $lang->misc->releaseDate['12.5.3']      = '2021-01-06';
 $lang->misc->releaseDate['12.5.2']      = '2020-12-18';
 $lang->misc->releaseDate['12.5.1']      = '2020-11-30';
@@ -138,6 +140,8 @@ $lang->misc->releaseDate['7.2.stable']  = '2015-05-22';
 $lang->misc->releaseDate['7.1.stable']  = '2015-03-07';
 $lang->misc->releaseDate['6.3.stable']  = '2014-11-07';
 
+$lang->misc->feature->all['15.0.rc2'][]    = array('title' => 'Fix Bug.', 'desc' => '');
+$lang->misc->feature->all['15.0.rc1'][]    = array('title' => 'Upgrade to 15,reframe menu, add program.', 'desc' => '');
 $lang->misc->feature->all['12.5.3'][]      = array('title' => 'Adjust annual data.', 'desc' => '');
 $lang->misc->feature->all['12.5.2'][]      = array('title' => 'Fix Bug', 'desc' => '');
 $lang->misc->feature->all['12.5.1'][]      = array('title' => 'Fix Bug', 'desc' => '');
diff --git a/module/misc/lang/vi.php b/module/misc/lang/vi.php
index 51de44ed5b..557f27373b 100644
--- a/module/misc/lang/vi.php
+++ b/module/misc/lang/vi.php
@@ -84,6 +84,8 @@ $lang->misc->feature = new stdclass();
 $lang->misc->feature->lastest  = 'Latest Version';
 $lang->misc->feature->detailed = 'Chi tiết';
 
+$lang->misc->releaseDate['15.0.rc2']    = '2021-04-09';
+$lang->misc->releaseDate['15.0.rc1']    = '2021-04-05';
 $lang->misc->releaseDate['12.5.3']      = '2021-01-06';
 $lang->misc->releaseDate['12.5.2']      = '2020-12-18';
 $lang->misc->releaseDate['12.5.1']      = '2020-11-30';
@@ -138,6 +140,8 @@ $lang->misc->releaseDate['7.2.stable']  = '2015-05-22';
 $lang->misc->releaseDate['7.1.stable']  = '2015-03-07';
 $lang->misc->releaseDate['6.3.stable']  = '2014-11-07';
 
+$lang->misc->feature->all['15.0.rc2'][]    = array('title' => 'Fix Bug.', 'desc' => '');
+$lang->misc->feature->all['15.0.rc1'][]    = array('title' => 'Upgrade to 15,reframe menu, add program.', 'desc' => '');
 $lang->misc->feature->all['12.5.3'][]      = array('title' => 'Adjust annual data.', 'desc' => '');
 $lang->misc->feature->all['12.5.2'][]      = array('title' => 'Fix Bug', 'desc' => '');
 $lang->misc->feature->all['12.5.1'][]      = array('title' => 'Fix Bug', 'desc' => '');
diff --git a/module/misc/lang/zh-cn.php b/module/misc/lang/zh-cn.php
index 78cad4e023..eeace1960c 100644
--- a/module/misc/lang/zh-cn.php
+++ b/module/misc/lang/zh-cn.php
@@ -84,6 +84,8 @@ $lang->misc->feature = new stdclass();
 $lang->misc->feature->lastest  = '最新版本';
 $lang->misc->feature->detailed = '详情';
 
+$lang->misc->releaseDate['15.0.rc2']    = '2021-04-09';
+$lang->misc->releaseDate['15.0.rc1']    = '2021-04-05';
 $lang->misc->releaseDate['12.5.3']      = '2021-01-06';
 $lang->misc->releaseDate['12.5.2']      = '2020-12-18';
 $lang->misc->releaseDate['12.5.1']      = '2020-11-30';
@@ -138,6 +140,8 @@ $lang->misc->releaseDate['7.2.stable']  = '2015-05-22';
 $lang->misc->releaseDate['7.1.stable']  = '2015-03-07';
 $lang->misc->releaseDate['6.3.stable']  = '2014-11-07';
 
+$lang->misc->feature->all['15.0.rc2'][]    = array('title' => '修复Bug，优化界面交互', 'desc' => '');
+$lang->misc->feature->all['15.0.rc1'][]    = array('title' => '升级到15版本，重构导航、文档库，增加项目集管理', 'desc' => '');
 $lang->misc->feature->all['12.5.3'][]      = array('title' => '优化年度总结', 'desc' => '');
 $lang->misc->feature->all['12.5.2'][]      = array('title' => '修复Bug', 'desc' => '');
 $lang->misc->feature->all['12.5.1'][]      = array('title' => '修复漏洞。', 'desc' => '');
diff --git a/module/upgrade/lang/version.php b/module/upgrade/lang/version.php
index 1d3010332f..2eede042cb 100644
--- a/module/upgrade/lang/version.php
+++ b/module/upgrade/lang/version.php
@@ -133,3 +133,4 @@ $lang->upgrade->fromVersions['12_5']       = '12.5';
 $lang->upgrade->fromVersions['12_5_1']     = '12.5.1';
 $lang->upgrade->fromVersions['12_5_2']     = '12.5.2';
 $lang->upgrade->fromVersions['12_5_3']     = '12.5.3';
+$lang->upgrade->fromVersions['15_0_rc1']   = '15.0.rc1';