diff --git a/test/utils/SharedData/src/SharedDataTest.cpp b/test/utils/SharedData/src/SharedDataTest.cpp
index 58df1d9d..5b24560e 100644
--- a/test/utils/SharedData/src/SharedDataTest.cpp
+++ b/test/utils/SharedData/src/SharedDataTest.cpp
@@ -188,4 +188,36 @@ namespace SharedDataTest
         }
         ILogUnInit();
     }
+    // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo7
+    TEST(SharedDataTest, Demo7)
+    {
+        constexpr int WRITABLE_DATA = 189;
+        CreateLogModule();
+        ILogInit(LOG_INSTANCE_TYPE_END);
+        constexpr int PROJECT_ID = 9;
+        SharedData *sharedDataPrimary = CreateSharedData(SHARER_NAME_PRIMARY, "./shared_file", PROJECT_ID);
+        SharedData *sharedDataMinor = CreateSharedData(SHARER_NAME_MINOR, "./shared_file", PROJECT_ID);
+        if (nullptr != sharedDataPrimary)
+        {
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            ISetWritableData(sharedDataPrimary, (void *)&WRITABLE_DATA, sizeof(int));
+        }
+        if (nullptr != sharedDataMinor)
+        {
+            constexpr int DEFAULT_DATA = 0;
+            int readableData = DEFAULT_DATA;
+            IMakeSharedData(sharedDataMinor, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataMinor, &readableData, sizeof(int));
+            PrintStringCode(code);
+            LogInfo("readableData = %d\n", readableData);
+            EXPECT_EQ(code.mStatusCode, STATUS_CODE_OK);
+            EXPECT_EQ(readableData, WRITABLE_DATA);
+            IFree(sharedDataMinor);
+        }
+        if (nullptr != sharedDataPrimary)
+        {
+            IFree(sharedDataPrimary);
+        }
+        ILogUnInit();
+    }
 } // namespace SharedDataTest
\ No newline at end of file
diff --git a/utils/SharedData/src/SharedDataImpl.cpp b/utils/SharedData/src/SharedDataImpl.cpp
index 80049d0b..6e6de0e4 100644
--- a/utils/SharedData/src/SharedDataImpl.cpp
+++ b/utils/SharedData/src/SharedDataImpl.cpp
@@ -128,17 +128,25 @@ void SharedDataCpp::SetWritableMemory(void *buf, const unsigned int &bufLength)
     if (SHARER_NAME_PRIMARY == mSharerName && bufLength == mMinorReadSize)
     {
         UserDataHeader *readableHeader = (UserDataHeader *)((char *)mSharedMemeory);
-        if (memcmp(readableHeader->mUserName, USER_NAME_INIT_NAME, USER_NAME_BUF_LENGTH) == 0 &&
-            mPrimaryReadSize == readableHeader->mDataLength)
+        if (memcmp(readableHeader->mUserName, USER_NAME_INIT_NAME, USER_NAME_BUF_LENGTH) == 0)
+        {
+            if (mPrimaryReadSize == readableHeader->mDataLength)
+            {
+                memcpy((char *)mSharedMemeory + sizeof(UserDataHeader) * THERE_TWO_USER_DATA_HEADER + mPrimaryReadSize,
+                       buf,
+                       bufLength);
+            }
+            else
+            {
+                LogError("Peer not match.\n");
+            }
+        }
+        else
         {
             memcpy((char *)mSharedMemeory + sizeof(UserDataHeader) * THERE_TWO_USER_DATA_HEADER + mPrimaryReadSize,
                    buf,
                    bufLength);
         }
-        else
-        {
-            LogError("Peer not match.\n");
-        }
     }
     else if (SHARER_NAME_MINOR == mSharerName && bufLength == mPrimaryReadSize)
     {