diff --git a/pom.xml b/pom.xml
index 018c002..677aa68 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,6 +38,12 @@
             <version>5.4.2</version>
             <scope>test</scope>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.6</version>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/main/java/com/github/hcsp/encapsulation/Main.java b/src/main/java/com/github/hcsp/encapsulation/Main.java
index 51ce4a1..43b197f 100644
--- a/src/main/java/com/github/hcsp/encapsulation/Main.java
+++ b/src/main/java/com/github/hcsp/encapsulation/Main.java
@@ -1,5 +1,7 @@
 package com.github.hcsp.encapsulation;
 
+import com.google.gson.Gson;
+
 public class Main {
     /*
          假设你正在为学校开发一个学生分数记录系统
@@ -26,7 +28,13 @@ public static void main(String[] args) {
         student = deserialize(json);
     }
     // 序列化：将Student类转换成JSON字符串
-    public static String serialize(Student student) {}
+    public static String serialize(Student student) {
+        Gson gson = new Gson();
+        return gson.toJson(student);
+    }
     // 反序列化：将JSON字符串转换成Student对象
-    public static Student deserialize(String json) {}
+    public static Student deserialize(String json) {
+        Gson gson = new Gson();
+        return gson.fromJson(json, Student.class);
+    }
 }
diff --git a/src/main/java/com/github/hcsp/encapsulation/Student.java b/src/main/java/com/github/hcsp/encapsulation/Student.java
index 85d2f55..ccb42cc 100644
--- a/src/main/java/com/github/hcsp/encapsulation/Student.java
+++ b/src/main/java/com/github/hcsp/encapsulation/Student.java
@@ -2,12 +2,47 @@
 
 public class Student {
     // 请按照Main类的要求，补全本类
-    /** 姓名 */
+    /**
+     * 姓名
+     */
     private String name;
 
-    /** 是否重考。true为重考，falase为非重考。 */
+    /**
+     * 是否重考。true为重考，falase为非重考。
+     */
     private boolean retakingExam;
 
-    /** 分数 */
+    /**
+     * 分数
+     */
     private int score;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public boolean isRetakingExam() {
+        return retakingExam;
+    }
+
+    public void setRetakingExam(boolean retakingExam) {
+        this.retakingExam = retakingExam;
+    }
+
+    public int getScore() {
+        return score;
+    }
+
+    public void setScore(int score) {
+        this.score = score;
+    }
+
+    public boolean isFail() {
+        int studentScore = getScore();
+        return studentScore < 60;
+    }
 }