diff --git a/W9/.gitignore b/W9/.gitignore
new file mode 100644
index 0000000..0925d0a
--- /dev/null
+++ b/W9/.gitignore
@@ -0,0 +1,4 @@
+*.jar
+*.jar
+*.class
+*.log
\ No newline at end of file
diff --git a/W9/Article.java b/W9/Article.java
new file mode 100644
index 0000000..bcd04bf
--- /dev/null
+++ b/W9/Article.java
@@ -0,0 +1,75 @@
+package com.example.datacollect.model;
+
+import java.time.LocalDate;
+
+public class Article {
+    private String title;
+    private String url;
+    private String content;
+    private String author;
+    private LocalDate publishDate;
+
+    public Article(String title, String url, String content) {
+        this.title = title;
+        this.url = url;
+        this.content = content;
+    }
+
+    public Article(String title, String url, String content, String author, LocalDate publishDate) {
+        this.title = title;
+        this.url = url;
+        this.content = content;
+        this.author = author;
+        this.publishDate = publishDate;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public LocalDate getPublishDate() {
+        return publishDate;
+    }
+
+    public void setPublishDate(LocalDate publishDate) {
+        this.publishDate = publishDate;
+    }
+
+    @Override
+    public String toString() {
+        return "Article{"
+                + "title='" + title + '\''
+                + ", url='" + url + '\''
+                + ", author='" + author + '\''
+                + ", publishDate=" + publishDate
+                + '}';
+    }
+}
\ No newline at end of file
diff --git a/W9/HistoryCommand.java b/W9/HistoryCommand.java
new file mode 100644
index 0000000..515671e
--- /dev/null
+++ b/W9/HistoryCommand.java
@@ -0,0 +1,45 @@
+package com.example.datacollect.command;
+
+import com.example.datacollect.model.Article;
+import com.example.datacollect.view.ConsoleView;
+import java.util.ArrayList;
+import java.util.List;
+
+public class HistoryCommand implements Command {
+    private static final List<String> commandHistory = new ArrayList<>();
+    private final ConsoleView view;
+
+    public HistoryCommand(ConsoleView view) {
+        this.view = view;
+    }
+
+    @Override
+    public String getName() {
+        return "history";
+    }
+
+    @Override
+    public void execute(String[] args, List<Article> articles) {
+        if (commandHistory.isEmpty()) {
+            view.printInfo("No command history.");
+            return;
+        }
+
+        view.printInfo("Command History:");
+        for (int i = 0; i < commandHistory.size(); i++) {
+            view.printInfo((i + 1) + ". " + commandHistory.get(i));
+        }
+    }
+
+    public static void addCommand(String command) {
+        commandHistory.add(command);
+    }
+
+    public static List<String> getCommandHistory() {
+        return new ArrayList<>(commandHistory);
+    }
+
+    public static void clearHistory() {
+        commandHistory.clear();
+    }
+}
\ No newline at end of file
diff --git a/W9/README.md b/W9/README.md
new file mode 100644
index 0000000..f8af0e4
--- /dev/null
+++ b/W9/README.md
@@ -0,0 +1,17 @@
+# DataCollect 教学项目 — 最小可运行版本
+
+这是一个最小可用的 Java CLI 演示工程，目标：打印帮助信息以验证运行环境。
+
+构建：
+```bash
+mvn -q package
+```
+
+运行（示例）：
+```bash
+java -jar target/datacollect-cli-0.1.0-jar-with-dependencies.jar --help
+```
+
+项目结构（最小）：
+- `src/main/java/com/example/datacollect/Main.java` — CLI 入口，打印帮助
+- `pom.xml` — Maven 构建配置，生成可执行 jar
diff --git a/W9/datacollect-cli-0.1.0-jar-with-dependencies.jar b/W9/datacollect-cli-0.1.0-jar-with-dependencies.jar
new file mode 100644
index 0000000..27a079d
Binary files /dev/null and b/W9/datacollect-cli-0.1.0-jar-with-dependencies.jar differ
diff --git a/W9/pom.xml b/W9/pom.xml
new file mode 100644
index 0000000..f07fa5a
--- /dev/null
+++ b/W9/pom.xml
@@ -0,0 +1,45 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.example</groupId>
+  <artifactId>datacollect-cli</artifactId>
+  <version>0.1.0</version>
+  <properties>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
+  </properties>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <version>3.8.1</version>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <version>3.3.0</version>
+        <configuration>
+          <archive>
+            <manifest>
+              <mainClass>com.example.datacollect.Main</mainClass>
+            </manifest>
+          </archive>
+          <descriptorRefs>
+            <descriptorRef>jar-with-dependencies</descriptorRef>
+          </descriptorRefs>
+        </configuration>
+        <executions>
+          <execution>
+            <id>make-assembly</id>
+            <phase>package</phase>
+            <goals>
+              <goal>single</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+</project>