diff --git a/app/controllers/api/v1/statuses_controller.rb b/app/controllers/api/v1/statuses_controller.rb
index 826d55a6c..9988567fc 100644
--- a/app/controllers/api/v1/statuses_controller.rb
+++ b/app/controllers/api/v1/statuses_controller.rb
@@ -52,7 +52,7 @@ class Api::V1::StatusesController < Api::BaseController
     thread = status_params[:in_reply_to_id].blank? ? nil : Status.find(status_params[:in_reply_to_id])
     masked = status_params[:status].end_with?('[mask]')
     sender = masked ? Account.find_local('mask_bot') : current_account
-    st_text = masked ? ("$#{to_cn(7919**(current_account.id + 1000 * Time.new.day) % 10000000007)}: " + status_params[:status][0..4900]) : status_params[:status]
+    st_text = masked ? ("$#{to_cn(7919**(current_account.id + 1000 * Time.new.day) % 1000000007)}:\n" + status_params[:status][0..4900]) : status_params[:status]
 
     @status = PostStatusService.new.call(sender,
                                          text: st_text,
diff --git a/app/javascript/styles/thu/diff.scss b/app/javascript/styles/thu/diff.scss
index f98e4f6e2..6b4a0bfe1 100644
--- a/app/javascript/styles/thu/diff.scss
+++ b/app/javascript/styles/thu/diff.scss
@@ -2,14 +2,14 @@
 /* Status */
 /* Drawer */
 body {
-	background: rgba(73, 58, 99, 1) url(https://www.tsinghua.edu.cn/publish/thu2018/images/footer.jpg) no-repeat fixed;
+	background: rgba(73, 58, 99, 1) url(https://www.tsinghua.edu.cn/images/footer.jpg) no-repeat fixed;
 	background-size: cover;
 	background-attachment: fixed;
   background-position: center;
   height: 100vh !important;
 }
 body.theme-thu {
-	background: rgba(73, 58, 99, 1) url(https://www.tsinghua.edu.cn/publish/thu2018/images/footer.jpg) no-repeat fixed;
+	background: rgba(73, 58, 99, 1) url(https://www.tsinghua.edu.cn/images/footer.jpg) no-repeat fixed;
 	background-size: cover;
 	background-attachment: fixed;
   background-position: center;
diff --git a/public/auto_comp_email.js b/public/auto_comp_email.js
index aec5730bb..090fe2184 100644
--- a/public/auto_comp_email.js
+++ b/public/auto_comp_email.js
@@ -8,7 +8,7 @@ em.addEventListener("blur", function( event ) {
 	if(ap.style.display != 'none' && em.value) {
 		em.value+=ap.innerText;
 		ap.style.display = 'none';
-		alert('注意:清华邮箱收取外部邮件会有至多十分钟的延迟，完成注册后请稍后再查收邮件')
+		alert('注意:清华邮箱收取外部邮件会有至多十分钟的延迟，完成注册后请稍后再查收邮件。请务必确保邮箱正确，闭社已经遇到了大量无效邮箱(例如漏掉了数字)')
 	}
 });