diff --git a/31.PImplPattern/01.Picture/PImpl.jpg b/31.PImplPattern/01.Picture/PImpl.jpg
new file mode 100644
index 0000000..70827f4
Binary files /dev/null and b/31.PImplPattern/01.Picture/PImpl.jpg differ
diff --git a/31.PImplPattern/02.Code/demo.cpp b/31.PImplPattern/02.Code/demo.cpp
new file mode 100644
index 0000000..59b098b
--- /dev/null
+++ b/31.PImplPattern/02.Code/demo.cpp
@@ -0,0 +1,27 @@
+#include "demo.h"
+// include other necessary files
+#include ....
+
+class PAimpl
+{
+public:
+    void func1(int a, char* b) 
+    {
+        // implementation
+    }
+    bool isEnabled()
+    {
+        // implementation
+        return true;
+    }
+};
+
+void A::func1(int a, char* b)
+{
+    pimpl->func1(a, b);
+}
+
+bool A::isEnabled()
+{
+    return pimpl->isEnabled();
+}
\ No newline at end of file
diff --git a/31.PImplPattern/02.Code/demo.h b/31.PImplPattern/02.Code/demo.h
new file mode 100644
index 0000000..a33cf26
--- /dev/null
+++ b/31.PImplPattern/02.Code/demo.h
@@ -0,0 +1,22 @@
+/*  header file */
+
+// forward declaration
+class PAimpl;
+
+class A
+{
+public:
+    A()
+    {
+        // initial work
+    }
+    ~A() {
+        // free resource
+    }
+public:
+    void func1(int a, char* b);
+    bool isEnabled();
+    // other public interface which will exposed outside
+private:
+    PAimpl* pimpl;
+};
\ No newline at end of file