diff --git a/src/main/java/mathlearning/ui/ChangeCodeFrame.java b/src/main/java/mathlearning/ui/ChangeCodeFrame.java
index 37ad12b..d799553 100644
--- a/src/main/java/mathlearning/ui/ChangeCodeFrame.java
+++ b/src/main/java/mathlearning/ui/ChangeCodeFrame.java
@@ -65,7 +65,7 @@ public class ChangeCodeFrame extends JFrame {
         //表单面板
         JPanel formPanel = new JPanel(new GridLayout(5, 2, 10, 10));
 
-        JLabel emailLabel = new JLabel("邮箱:");
+        JLabel emailLabel = new JLabel("QQ邮箱:");
         emailLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         emailField = new JTextField();
 
@@ -80,7 +80,7 @@ public class ChangeCodeFrame extends JFrame {
         codePanel.add(codeField, BorderLayout.CENTER);
         codePanel.add(sendCodeButton, BorderLayout.EAST);
 
-        JLabel passwordLabel = new JLabel("新密码:");
+        JLabel passwordLabel = new JLabel("新密码（大小写字母+数字）:");
         passwordLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         passwordField = new JPasswordField();
 
diff --git a/src/main/java/mathlearning/ui/ChangePasswordFrame.java b/src/main/java/mathlearning/ui/ChangePasswordFrame.java
index 96848fe..f79431b 100644
--- a/src/main/java/mathlearning/ui/ChangePasswordFrame.java
+++ b/src/main/java/mathlearning/ui/ChangePasswordFrame.java
@@ -46,7 +46,7 @@ public class ChangePasswordFrame extends JFrame {
         mainPanel.add(titleLabel, BorderLayout.NORTH);
 
         //表单
-        JPanel infoPanel = new JPanel(new GridLayout(4, 2, 10, 10));
+        JPanel infoPanel = new JPanel(new GridLayout(3, 2, 10, 10));
         JLabel oldPasswordLabel = new JLabel("请输入旧密码：");
         oldPasswordLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         oldPasswordField = new JPasswordField();
@@ -62,7 +62,12 @@ public class ChangePasswordFrame extends JFrame {
         confirmPasswordField = new JPasswordField();
         infoPanel.add(confirmPasswordLabel);
         infoPanel.add(confirmPasswordField);
-        mainPanel.add(infoPanel, BorderLayout.CENTER);
+        JLabel infoLabel = new JLabel("密码需要包含大小写字母以及数字，6-10位。");
+        infoLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
+        JPanel centerPanel = new JPanel(new BorderLayout());
+        centerPanel.add(infoPanel, BorderLayout.CENTER);
+        centerPanel.add(infoLabel, BorderLayout.SOUTH);
+        mainPanel.add(centerPanel, BorderLayout.CENTER);
 
         //按钮
         JPanel buttonPanel = new JPanel(new FlowLayout());
diff --git a/src/main/java/mathlearning/ui/LoginFrame.java b/src/main/java/mathlearning/ui/LoginFrame.java
index b2f5a96..e116abb 100644
--- a/src/main/java/mathlearning/ui/LoginFrame.java
+++ b/src/main/java/mathlearning/ui/LoginFrame.java
@@ -37,7 +37,7 @@ public class LoginFrame extends JFrame{
         // 表单面板
         JPanel formPanel = new JPanel(new GridLayout(3, 2, 10, 10));
 
-        JLabel emailLabel = new JLabel("邮箱:");
+        JLabel emailLabel = new JLabel("QQ邮箱:");
         emailLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         emailField = new JTextField();
 
diff --git a/src/main/java/mathlearning/ui/RegisterFrame.java b/src/main/java/mathlearning/ui/RegisterFrame.java
index fb0f5a9..ef7997e 100644
--- a/src/main/java/mathlearning/ui/RegisterFrame.java
+++ b/src/main/java/mathlearning/ui/RegisterFrame.java
@@ -64,13 +64,13 @@ public class RegisterFrame extends JFrame{
         mainPanel.add(titleLabel, BorderLayout.NORTH);
 
         // 表单面板
-        JPanel formPanel = new JPanel(new GridLayout(5, 2, 10, 10));
+        JPanel formPanel = new JPanel(new GridLayout(6, 2, 10, 10));
 
         JLabel nameLabel = new JLabel("用户名:");
         nameLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         nameField = new JTextField();
 
-        JLabel emailLabel = new JLabel("邮箱:");
+        JLabel emailLabel = new JLabel("QQ邮箱:");
         emailLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         emailField = new JTextField();
 
@@ -93,6 +93,9 @@ public class RegisterFrame extends JFrame{
         confirmPasswordLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
         confirmPasswordField = new JPasswordField();
 
+        JLabel infoLabel = new JLabel("提示：密码需要包含大小写字母以及数字，6-10位。");
+        infoLabel.setFont(new Font("微软雅黑", Font.PLAIN, 14));
+
         formPanel.add(nameLabel);
         formPanel.add(nameField);
         formPanel.add(emailLabel);
@@ -104,7 +107,11 @@ public class RegisterFrame extends JFrame{
         formPanel.add(confirmPasswordLabel);
         formPanel.add(confirmPasswordField);
 
-        mainPanel.add(formPanel, BorderLayout.CENTER);
+        JPanel centerPanel = new JPanel(new BorderLayout());
+        centerPanel.add(formPanel, BorderLayout.CENTER);
+        centerPanel.add(infoLabel, BorderLayout.SOUTH);
+
+        mainPanel.add(centerPanel, BorderLayout.CENTER);
 
         // 按钮面板
         JPanel buttonPanel = new JPanel(new FlowLayout());