diff --git a/0307.3 b/0307.3
new file mode 100644
index 0000000000000000000000000000000000000000..ba4685bf56a8ca8b47bd48d77fb8006d0deafa9d
--- /dev/null
+++ b/0307.3
@@ -0,0 +1,23 @@
+package java2020spring;
+
+
+
+	 
+	import javax.swing.*;
+	 
+	public class AboutBook extends JFrame{
+	 public AboutBook(){
+	  super("关于记事本");
+	  this.setSize(220, 100);
+	  this.setLocation(200,300);
+	  this.setResizable(false);
+	  this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
+	  this.setVisible(true);
+	  
+	  JPanel panel = new JPanel();
+	  JLabel label = new JLabel("版本2021H2");
+	  
+	  panel.add(label);
+	  this.add(panel);
+	 }
+	}