diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
index 78b908d9..31e90c3d 100644
--- a/.github/pull_request_template.md
+++ b/.github/pull_request_template.md
@@ -1,5 +1,8 @@
 ## Description
 
+<!-- You can check sample PR here: (remember delete this link when you create your PR) -->
+<https://github.com/SQLab/112-spring-software-testing/pull/2>
+
 <!-- Please briefly describe your change here -->
 
 ---
@@ -7,9 +10,10 @@
 <!-- Please make sure you're satisfy and fill the following checkboxes -->
 <!-- A good PR should include the following parts: -->
 
-- [ ] A clear title
+
+- [ ] A clear title (name your pr "[LAB{lab_number}] {your_student_id}")
 - [ ] A meaningful message for PR, as well as its commits
-- [ ] From your specific branch (***not master***) merging to your branch
+- [ ] From your specific branch (***not main or other's branch***) merging to your branch
 - [ ] Excluding any irrelevant files, such as binaries, text files, or dot files
 - [ ] Passing tests/CI
-- [ ] Add proper label for this PR
+
diff --git a/.github/workflows/label.yml b/.github/workflows/label.yml
new file mode 100644
index 00000000..4e7902a5
--- /dev/null
+++ b/.github/workflows/label.yml
@@ -0,0 +1,24 @@
+name: Automatic PR Labeler
+on:
+    pull_request_target:
+        types: [opened, reopened, edited]
+
+jobs:
+    labeler:
+        runs-on: ubuntu-latest
+        steps:
+            - name: Label PR
+              uses: actions/github-script@v5
+              with:
+                  github-token: ${{ secrets.PAT }}
+                  script: |
+                      const { owner, repo, number: issue_number } = context.issue;
+                      const pr = await github.rest.pulls.get({ owner, repo, pull_number: issue_number });
+                      const title = pr.data.title;
+                      const labRegex = /\[LAB(\d+)\]/i;
+
+                      const match = title.match(labRegex);
+                      if (match) {
+                        const labelToAdd = 'lab' + match[1];
+                        await github.rest.issues.addLabels({ owner, repo, issue_number, labels: [labelToAdd] });
+                      }
diff --git a/lab1/README.md b/lab1/README.md
index f205b0b9..779166ca 100644
--- a/lab1/README.md
+++ b/lab1/README.md
@@ -6,8 +6,7 @@ In this lab, you will write unit tests for functions implemented in `main.js`. Y
 
 ## Requirement
 
-1. Write test cases in `main_test.js` and achieve 100% code coverage. (90%)
-2. Add a badge and make it show `passing` in `README.md` in the root folder. (10%)
+1. Write test cases in `main_test.js` and achieve 100% code coverage. (100%)
 
 You can run `validate.sh` in your local to test if you satisfy the requirements.
 
diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..58d28cbb 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -1,23 +1,47 @@
-const test = require('node:test');
-const assert = require('assert');
-const { MyClass, Student } = require('./main');
-
-test("Test MyClass's addStudent", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
-
-test("Test MyClass's getStudentById", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
-
-test("Test Student's setName", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
-
-test("Test Student's getName", () => {
-    // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+const test = require('node:test');
+const assert = require('assert');
+const { MyClass, Student } = require('./main');
+
+test("Test MyClass's addStudent", () => {
+	const mc = new MyClass();
+	const st = new Student();
+	assert.strictEqual(mc.addStudent(mc), -1); // not Student class
+	assert.strictEqual(mc.addStudent(st), 0); // 1 students
+	assert.strictEqual(mc.addStudent(st), 1); // 2 students
+});
+
+test("Test MyClass's getStudentById", () => {
+	const mc = new MyClass();
+	
+	const st1 = new Student();
+	st1.setName("st1");
+	const st2 = new Student();
+	st2.setName("st2");
+	mc.addStudent(st1);
+	mc.addStudent(st2);
+	
+	assert.strictEqual(mc.getStudentById(-1), null); // id < 0
+	assert.strictEqual(mc.getStudentById(2), null); // id >= length
+	assert.strictEqual(mc.getStudentById(0), st1); // st1
+	assert.strictEqual(mc.getStudentById(1), st2); // st2
+});
+
+test("Test Student's setName", () => {
+	const st1 = new Student();
+	st1.setName("st1");
+	const st2 = new Student();
+	st2.setName(1);
+	
+	assert.strictEqual(st1.name, "st1"); // st1
+	assert.strictEqual(st2.name, undefined); // st2 not a string
+});
+
+test("Test Student's getName", () => {
+	const st1 = new Student();
+	st1.setName("st1");
+	const st2 = new Student();
+	
+	assert.strictEqual(st1.getName(), "st1"); // st1
+	assert.strictEqual(st2.getName(), ''); // st2
+});
+
diff --git a/lab1/validate.sh b/lab1/validate.sh
index dca233b1..6eb7ac2c 100755
--- a/lab1/validate.sh
+++ b/lab1/validate.sh
@@ -9,7 +9,9 @@ cd $tmp_dir
 
 rm -rf *
 cp $solution_path/*.js .
-result=$($node --test --experimental-test-coverage) ; ret=$?
+
+result=$($"node" --test --experimental-test-coverage) ; ret=$?
+
 if [ $ret -ne 0 ] ; then
   echo "[!] testing fails"
   exit 1