diff --git a/AT32F425/src/DAP_config.h b/AT32F425/src/DAP_config.h
index 9427c0a..586f7e9 100644
--- a/AT32F425/src/DAP_config.h
+++ b/AT32F425/src/DAP_config.h
@@ -160,8 +160,8 @@ static const char TargetBoardName    [] = TARGET_BOARD_NAME;
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
-  memcpy((unsigned char*)str, "XIVN1987", sizeof("XIVN1987"));
-  return sizeof("XIVN1987");
+  (void)str;
+  return (0U);
 }
 
 /** Get Product Name string.
@@ -169,8 +169,8 @@ __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
-  memcpy((unsigned char*)str, "XV-Link CMSIS-DAP", sizeof("XV-Link CMSIS-DAP"));
-  return sizeof("XV-Link CMSIS-DAP");
+  (void)str;
+  return (0U);
 }
 
 /** Get Serial Number string.
@@ -178,8 +178,8 @@ __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetSerNumString (char *str) {
-  memcpy((unsigned char*)str, "002412080000", sizeof("002412080000"));
-  return sizeof("002412080000");
+  (void)str;
+  return (0U);
 }
 
 /** Get Target Device Vendor string.
@@ -255,8 +255,8 @@ __STATIC_INLINE uint8_t DAP_GetTargetBoardNameString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductFirmwareVersionString (char *str) {
-  memcpy((unsigned char*)str, "V1.1", sizeof("V1.1"));
-  return sizeof("V1.1");
+  memcpy((unsigned char*)str, "V1.2", strlen("V1.2")+1);
+  return strlen("V1.2")+1;
 }
 
 ///@}
diff --git a/CH32V203/src/DAP_config.h b/CH32V203/src/DAP_config.h
index 707ace0..9a31fcd 100644
--- a/CH32V203/src/DAP_config.h
+++ b/CH32V203/src/DAP_config.h
@@ -161,8 +161,8 @@ static const char TargetBoardName    [] = TARGET_BOARD_NAME;
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
-  memcpy((unsigned char*)str, "XIVN1987", sizeof("XIVN1987"));
-  return sizeof("XIVN1987");
+  (void)str;
+  return (0U);
 }
 
 /** Get Product Name string.
@@ -170,8 +170,8 @@ __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
-  memcpy((unsigned char*)str, "XV-Link CMSIS-DAP", sizeof("XV-Link CMSIS-DAP"));
-  return sizeof("XV-Link CMSIS-DAP");
+  (void)str;
+  return (0U);
 }
 
 /** Get Serial Number string.
@@ -179,8 +179,8 @@ __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetSerNumString (char *str) {
-  memcpy((unsigned char*)str, "002412080000", sizeof("002412080000"));
-  return sizeof("002412080000");
+  (void)str;
+  return (0U);
 }
 
 /** Get Target Device Vendor string.
@@ -256,8 +256,8 @@ __STATIC_INLINE uint8_t DAP_GetTargetBoardNameString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductFirmwareVersionString (char *str) {
-  memcpy((unsigned char*)str, "V1.1", sizeof("V1.1"));
-  return sizeof("V1.1");
+  memcpy((unsigned char*)str, "V1.2", strlen("V1.2")+1);
+  return strlen("V1.2")+1;
 }
 
 ///@}
diff --git a/CH32V305/src/DAP_config.h b/CH32V305/src/DAP_config.h
index d15da8d..7076e3f 100644
--- a/CH32V305/src/DAP_config.h
+++ b/CH32V305/src/DAP_config.h
@@ -161,8 +161,8 @@ static const char TargetBoardName    [] = TARGET_BOARD_NAME;
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
-  memcpy((unsigned char*)str, "XIVN1987", sizeof("XIVN1987"));
-  return sizeof("XIVN1987");
+  (void)str;
+  return (0U);
 }
 
 /** Get Product Name string.
@@ -170,8 +170,8 @@ __STATIC_INLINE uint8_t DAP_GetVendorString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
-  memcpy((unsigned char*)str, "XV-Link CMSIS-DAP", sizeof("XV-Link CMSIS-DAP"));
-  return sizeof("XV-Link CMSIS-DAP");
+  (void)str;
+  return (0U);
 }
 
 /** Get Serial Number string.
@@ -179,8 +179,8 @@ __STATIC_INLINE uint8_t DAP_GetProductString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetSerNumString (char *str) {
-  memcpy((unsigned char*)str, "002412080000", sizeof("002412080000"));
-  return sizeof("002412080000");
+  (void)str;
+  return (0U);
 }
 
 /** Get Target Device Vendor string.
@@ -256,8 +256,8 @@ __STATIC_INLINE uint8_t DAP_GetTargetBoardNameString (char *str) {
 \return String length (including terminating NULL character) or 0 (no string).
 */
 __STATIC_INLINE uint8_t DAP_GetProductFirmwareVersionString (char *str) {
-  memcpy((unsigned char*)str, "V1.1", sizeof("V1.1"));
-  return sizeof("V1.1");
+  memcpy((unsigned char*)str, "V1.2", strlen("V1.2")+1);
+  return strlen("V1.2")+1;
 }
 
 ///@}