diff --git a/app/Sidebar.tsx b/app/Sidebar.tsx
index fc77bc6..4669a1e 100644
--- a/app/Sidebar.tsx
+++ b/app/Sidebar.tsx
@@ -58,7 +58,7 @@ const social = [
   },
   {
     name: 'Email',
-    url: 'mailto:mail@zzzhizhi.top',
+    url: 'mailto:zzzhizhi@ourmoc.cn',
     icon: TbMail,
   },
 ]
diff --git a/app/[locale]/careers/Careers.tsx b/app/[locale]/careers/Careers.tsx
index 7bb13ba..a733f39 100644
--- a/app/[locale]/careers/Careers.tsx
+++ b/app/[locale]/careers/Careers.tsx
@@ -276,7 +276,7 @@ function JobApplicationForm({ link }: { link: string }) {
                     <span className="inline-flex items-center space-x-0.5 text-stone-600 dark:text-stone-300 md:ml-1">
                       <TbMail className="h-4 w-4" />
                       <a
-                        href="mailto:mail@zzzhizhi.top"
+                        href="mailto:zzzhizhi@ourmoc.cn"
                         className="text-stone-600 no-underline hover:underline dark:text-stone-300"
                       >
                         {text}
diff --git a/app/[locale]/contact/Contact.tsx b/app/[locale]/contact/Contact.tsx
index ece6229..e06939f 100644
--- a/app/[locale]/contact/Contact.tsx
+++ b/app/[locale]/contact/Contact.tsx
@@ -60,7 +60,7 @@ export function Contact() {
                   <span className="inline-flex items-center space-x-0.5 text-stone-600 dark:text-stone-300 md:mx-1">
                     <TbMail className="h-4 w-4" />
                     <a
-                      href="mailto:mail@zzzhizhi.top"
+                      href="mailto:zzzhizhi@ourmoc.cn"
                       className="text-stone-600 no-underline hover:underline dark:text-stone-300"
                     >
                       {text}
diff --git a/messages/en.json b/messages/en.json
index 40fadca..a7d3ca9 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -81,7 +81,7 @@
       "Preface": "Like a flock of high-tech birds 🐦, <green>fully remote yet always connected</green>, most of us teach or learn from home, but we do have a great space in 🏙️ <b>Shenzhen</b> for offline collaboration. No matter where we are, we’re all <red>❤️ passionate creators</red>. We love challenges and pour our energy into every course and project. Whether you’re a <b>“coding ninja 🥷”</b> from Tokyo, a <b>“tea connoisseur 🍵”</b> from Hangzhou, or a <b>“dim sum master 🥟”</b> from Hong Kong, if you share our enthusiasm for public education, we look forward to having you on board!",
       "Application": {
         "Title": "Apply now",
-        "Tips": "You can also apply by sending us an email via <email>mail@zzzhizhi.top</email>",
+        "Tips": "You can also apply by sending us an email via <email>zzzhizhi@ourmoc.cn</email>",
         "About": {
           "Label": "About you",
           "Placeholder": "✍\uFE0F Tell us a bit about yourself."
@@ -162,7 +162,7 @@
     "Title": "Contact us",
     "Heading": "Contact us: <gradient>look forward to sparking ideas with you</gradient>",
     "Description": "We are always looking for opportunities to collaborate with like-minded folks. Whether you have a project to discuss or just want to say hi, we’d love to hear from you 👏.",
-    "Tips": "You can also reach out via email at <email>mail@zzzhizhi.top</email>.",
+    "Tips": "You can also reach out via email at <email>zzzhizhi@ourmoc.cn</email>.",
     "Form": {
       "Message": {
         "Label": "Leave a message",
diff --git a/messages/zh-CN.json b/messages/zh-CN.json
index a1e783a..bde13ae 100644
--- a/messages/zh-CN.json
+++ b/messages/zh-CN.json
@@ -81,7 +81,7 @@
       "Preface": "西科大学的师生就像一群高科技的鸟群一样 🐦，<green>完全远程，却始终保持着联系</green>。虽然我们大部分人都在<b>居家远程教、学</b>，但我们在 🏙️ <b>深圳</b> 也有一个很棒的办公空间，可以线下聚集在一起协作与玩耍。但无论我们在哪里，我们都是 <red>❤\uFE0F 衷心的创造者</red>。我们热爱挑战自己，为每个课程和研究投入我们满腔的热情。所以无论你是来自东京的<b>「代码忍者 🥷」</b>、杭州的<b>「茶艺鉴赏家 🍵」</b>，还是香港的<b>「点心大师 🥟」</b>，只要你热爱我们的公益文教事业，我们都很期待你的加入！",
       "Application": {
         "Title": "现在申请",
-        "Tips": "你也可以直接发送邮件到 <email>mail@zzzhizhi.top</email>",
+        "Tips": "你也可以直接发送邮件到 <email>zzzhizhi@ourmoc.cn</email>",
         "About": {
           "Label": "自我介绍",
           "Placeholder": "✍\uFE0F 简短的自我描述."
@@ -162,7 +162,7 @@
     "Title": "联系我们",
     "Heading": "联系我们：<gradient>期待与你碰撞火花</gradient>",
     "Description": "我们始终在寻找与志同道合的人合作的新机会。无论你是有一个项目想要讨论，或者只是想打个招呼，我们都随时欢迎 👏。",
-    "Tips": "你也可以通过发送邮件到 <email>mail@zzzhizhi.top</email> 来跟我们联系。",
+    "Tips": "你也可以通过发送邮件到 <email>zzzhizhi@ourmoc.cn</email> 来跟我们联系。",
     "Form": {
       "Message": {
         "Label": "留个言吧",
diff --git a/pages/api/og.tsx b/pages/api/og.tsx
index cebf2f3..ce32236 100644
--- a/pages/api/og.tsx
+++ b/pages/api/og.tsx
@@ -33,7 +33,7 @@ export default async function handler(req: NextRequest) {
           flexDirection: 'column',
           alignItems: 'flex-start',
           justifyContent: 'center',
-          backgroundImage: `url(https://xku.zzzhizhi.top/assets/og-bg-${locale}.jpg)`,
+          backgroundImage: `url(https://xku.ourmoc.cn/assets/og-bg-${locale}.jpg)`,
         }}
       >
         {subtitle && (