diff --git a/js/builtin/deviceinfokit/src/nativeapi_deviceinfo.cpp b/js/builtin/deviceinfokit/src/nativeapi_deviceinfo.cpp
index 4845a09..5e57858 100755
--- a/js/builtin/deviceinfokit/src/nativeapi_deviceinfo.cpp
+++ b/js/builtin/deviceinfokit/src/nativeapi_deviceinfo.cpp
@@ -14,6 +14,7 @@
  */
 
 #include "nativeapi_deviceinfo.h"
+#include <string>
 #include "global.h"
 #include "js_async_work.h"
 #include "nativeapi_common.h"
@@ -69,13 +70,11 @@ void InitDeviceModule(JSIValue exports)
 
 bool NativeapiDeviceInfo::GetAPILevel(JSIValue result)
 {
-    char* apiLevel = GetSdkApiLevel();
-    if (apiLevel == nullptr) {
+    int apiLevel = GetSdkApiVersion();
+    if (apiLevel < 1) {
         return false;
     }
-    JSI::SetStringProperty(result, "apiVersion", apiLevel);
-    free(apiLevel);
-    apiLevel = nullptr;
+    JSI::SetStringProperty(result, "apiVersion", std::to_string(apiLevel).c_str());
     return true;
 }
 
@@ -86,13 +85,11 @@ JSIValue NativeapiDeviceInfo::GetDeviceInfo(const JSIValue thisVal, const JSIVal
 
 bool NativeapiDeviceInfo::GetDeviceType(JSIValue result)
 {
-    char* deviceType = GetProductType();
+    const char* deviceType = ::GetDeviceType();
     if (deviceType == nullptr) {
         return false;
     }
     JSI::SetStringProperty(result, "deviceType", deviceType);
-    free(deviceType);
-    deviceType = nullptr;
     return true;
 }
 
@@ -111,9 +108,9 @@ bool NativeapiDeviceInfo::GetLanguage(JSIValue result)
 bool NativeapiDeviceInfo::GetProductInfo(JSIValue result)
 {
     bool isSuccess = true;
-    char* brand =  GetBrand();
-    char* manufacture = GetManufacture();
-    char* model = GetProductModel();
+    const char* brand =  GetBrand();
+    const char* manufacture = GetManufacture();
+    const char* model = GetProductModel();
     if (brand == nullptr || manufacture == nullptr || model == nullptr) {
         isSuccess = false;
     } else {
@@ -139,18 +136,6 @@ bool NativeapiDeviceInfo::GetProductInfo(JSIValue result)
     const char * const defaultScreenShape = "rect";
     JSI::SetNumberProperty(result, "screenDensity", (double)defaultScreenDensity);
     JSI::SetStringProperty(result, "screenShape", defaultScreenShape);
-    if (brand != nullptr) {
-        free(brand);
-        brand = nullptr;
-    }
-    if (manufacture != nullptr) {
-        free(manufacture);
-        manufacture = nullptr;
-    }
-    if (model != nullptr) {
-        free(model);
-        model = nullptr;
-    }
     return isSuccess;
 }
 
diff --git a/os_dump/dump_syspara.c b/os_dump/dump_syspara.c
index 4646cf4..c6542c5 100644
--- a/os_dump/dump_syspara.c
+++ b/os_dump/dump_syspara.c
@@ -21,8 +21,26 @@
 #include "wifiiot_at.h"
 #endif
 
+#define API_VERSION_LEN 10
+
+static const char* GetSdkApiLevel()
+{
+    static char sdkApiVersion[API_VERSION_LEN] = {0};
+    int sdkApi = GetSdkApiVersion();
+    sprintf_s(sdkApiVersion, API_VERSION_LEN, "%d", sdkApi);
+    return sdkApiVersion;
+}
+
+static const char* GetFirstApiLevel()
+{
+    static char firstApiVersion[API_VERSION_LEN] = {0};
+    int firstApi = GetSdkApiVersion();
+    sprintf_s(firstApiVersion, API_VERSION_LEN, "%d", firstApi);
+    return firstApiVersion;
+}
+
 static const SysParaInfoItem SYSPARA_LIST[] = {
-    {"ProductType", GetProductType},
+    {"DeviceType", GetDeviceType},
     {"Manufacture", GetManufacture},
     {"Brand", GetBrand},
     {"MarketName", GetMarketName},
@@ -31,13 +49,13 @@ static const SysParaInfoItem SYSPARA_LIST[] = {
     {"SoftwareModel", GetSoftwareModel},
     {"HardwareModel", GetHardwareModel},
     {"Serial", GetSerial},
-    {"OsName", GetOsName},
+    {"OSFullName", GetOSFullName},
     {"DisplayVersion", GetDisplayVersion},
     {"BootloaderVersion", GetBootloaderVersion},
     {"GetSecurityPatchTag", GetSecurityPatchTag},
     {"AbiList", GetAbiList},
-    {"SdkApiLevel", GetSdkApiLevel},
-    {"FirstApiLevel", GetFirstApiLevel},
+    {"SdkApiVersion", GetSdkApiLevel},
+    {"FirstApiVersion", GetFirstApiLevel},
     {"IncrementalVersion", GetIncrementalVersion},
     {"VersionId", GetVersionId},
     {"BuildType", GetBuildType},
@@ -64,8 +82,6 @@ int QuerySysparaCmd()
     while (index < dumpInfoItemNum) {
         temp = SYSPARA_LIST[index].getInfoValue();
         pfnPrintf("%s:%s\r\n", SYSPARA_LIST[index].infoName, temp);
-        free(temp);
-        temp = NULL;
         index++;
     }
     pfnPrintf("=======================\r\n");