diff --git a/mysql.sql b/mysql.sql
index fd1fc3a..074b95e 100644
--- a/mysql.sql
+++ b/mysql.sql
@@ -1,5 +1,5 @@
 CREATE TABLE user (
-    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT AUTO_INCREMENT PRIMARY KEY,
     nickname VARCHAR(50) NOT NULL,
     phone_number VARCHAR(15) NOT NULL UNIQUE,
     password VARCHAR(255) NOT NULL,
@@ -8,7 +8,9 @@ CREATE TABLE user (
 );
 
 INSERT INTO user (nickname, phone_number, password, identity, status) VALUES
-('Alice', '1', '$2b$12$okY88GrzlUHb/Ox1ENwtqeBUnE0bgMOCPy.UKmFaTnu3El7EYX8Em', 'student', TRUE);
+('学生', '1', '$2b$12$okY88GrzlUHb/Ox1ENwtqeBUnE0bgMOCPy.UKmFaTnu3El7EYX8Em', 'student', TRUE),
+('老师', '2', '$2b$12$okY88GrzlUHb/Ox1ENwtqeBUnE0bgMOCPy.UKmFaTnu3El7EYX8Em', 'teacher', TRUE);
+
 
 
 
@@ -72,10 +74,17 @@ CREATE TABLE class_courses (
     class_course_id INT AUTO_INCREMENT PRIMARY KEY,
     class_id INT NOT NULL,
     course_id INT NOT NULL,
+    user_id  INT NOT NULL,
     FOREIGN KEY (class_id) REFERENCES classes(class_id),
-    FOREIGN KEY (course_id) REFERENCES courses(course_id)
+    FOREIGN KEY (course_id) REFERENCES courses(course_id),
+    FOREIGN KEY (user_id) REFERENCES user(user_id),
 );
 
+INSERT INTO class_courses(class_id,course_id,user_id) VALUES
+(1,2,2),
+(1,3,2),
+(2,6,2);
+
 CREATE TABLE classes (
     class_id INT AUTO_INCREMENT PRIMARY KEY,
     class_name VARCHAR(255) NOT NULL,