diff --git a/arkui/ace_napi_test/entry/src/main/cpp/napi/napi_test.cpp b/arkui/ace_napi_test/entry/src/main/cpp/napi/napi_test.cpp
index 20740aaf96a0b8e1ca95ba1e8e1c9ea39d8b63fe..485c756dc5010aff8e5be6446e14e43d723d5c2c 100644
--- a/arkui/ace_napi_test/entry/src/main/cpp/napi/napi_test.cpp
+++ b/arkui/ace_napi_test/entry/src/main/cpp/napi/napi_test.cpp
@@ -666,6 +666,96 @@ static napi_value createAndGetStringUtf8(napi_env env, napi_callback_info info)
     return output;
 }
 
+static napi_value CreateAndGetStringUtf16(napi_env env, napi_callback_info info) {
+    size_t argc = 1;
+    napi_value args[1];
+    NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
+
+    NAPI_ASSERT(env, argc >= 1, "Wrong number of arguments.");
+
+    napi_valuetype valuetype;
+    NAPI_CALL(env, napi_typeof(env, args[0], &valuetype));
+
+    NAPI_ASSERT(env, valuetype == napi_string, "Expect a string.");
+
+    char16_t buffer[128]; // 128: char16_t type of element size
+    size_t buffer_size = 128; // 128: char16_t type of element size
+    size_t copied  = 0;
+
+    NAPI_CALL(env, napi_get_value_string_utf16(env, args[0], buffer, buffer_size, &copied));
+
+    napi_value result;
+    NAPI_CALL(env, napi_create_string_utf16(env, buffer, copied, &result));
+
+    return result;
+}
+
+static napi_value StringUtf16OfCase(napi_env env, napi_callback_info info) {
+    size_t argc = 1;
+    napi_value args[1];
+    NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
+
+    NAPI_ASSERT(env, argc >= 1, "Wrong number of arguments.");
+
+    napi_valuetype valuetype;
+    NAPI_CALL(env, napi_typeof(env, args[0], &valuetype));
+
+    NAPI_ASSERT(env, valuetype == napi_string, "Expects a string.");
+
+    char16_t buffer[5]; // 5: char16_t type of element size
+    size_t buffer_size = 5; // 5: char16_t type of element size
+    size_t copied  = 0;
+
+    NAPI_CALL(env,
+        napi_get_value_string_utf16(env, args[0], buffer, buffer_size, &copied));
+
+    napi_value result;
+    NAPI_CALL(env, napi_create_string_utf16(env, buffer, copied, &result));
+
+    return result;
+}
+
+static const napi_type_tag typeTags[5] = {
+    {0xdaf987b3cc62481a, 0xb745b0497f299531},
+    {0xbb7936c374084d9b, 0xa9548d0762eeedb9},
+    {0xa5ed9ce2e4c00c38, 0xa9548d0762eeedb1},
+    {0, 0},
+    {0xa5ed9ce2e4c00c38, 0xdaf987b3cc62481a},
+};
+
+static napi_value TypeTaggedInstance(napi_env env, napi_callback_info info) {
+    size_t argc = 1;
+    uint32_t typeIndex = 0;
+    napi_value instance = nullptr; 
+    napi_value whichType = nullptr;
+    NAPI_CALL(env, napi_get_cb_info(env, info, &argc, &whichType, NULL, NULL));
+    NAPI_CALL(env, napi_get_value_uint32(env, whichType, &typeIndex));
+    NAPI_ASSERT(env, typeIndex <= 5, "typeIndex out of range");
+    NAPI_CALL(env, napi_create_object(env, &instance));
+
+    NAPI_CALL(env, napi_type_tag_object(env, instance, &typeTags[typeIndex]));
+    return instance;
+}
+
+static napi_value CheckTypeTag(napi_env env, napi_callback_info info) {
+    size_t argc = 2;
+    bool result;
+    napi_value argv[2];
+    napi_value jsResult = nullptr;
+    uint32_t typeIndex;
+
+    NAPI_CALL(env, napi_get_cb_info(env, info, &argc, argv, NULL, NULL));
+
+    NAPI_CALL(env, napi_get_value_uint32(env, argv[0], &typeIndex));
+
+    NAPI_ASSERT(env, typeIndex <= 5, "typeIndex out of range");
+
+    NAPI_CALL(env, napi_check_object_type_tag(env, argv[1], &typeTags[typeIndex], &result));
+    NAPI_CALL(env, napi_get_boolean(env, result, &jsResult));
+
+    return jsResult;
+}
+
 static napi_value getPrototype(napi_env env, napi_callback_info info)
 {
     napi_value testWrapClass = nullptr;
@@ -2192,6 +2282,10 @@ static napi_value Init(napi_env env, napi_value exports)
         DECLARE_NAPI_FUNCTION("napiCreateBigintInt64", napiCreateBigintInt64),
         DECLARE_NAPI_FUNCTION("napiCreateBigintWords", napiCreateBigintWords),
         DECLARE_NAPI_FUNCTION("napiGetCbInfo", napiGetCbInfo),
+        DECLARE_NAPI_FUNCTION("checkTypeTag", CheckTypeTag),
+        DECLARE_NAPI_FUNCTION("typeTaggedInstance", TypeTaggedInstance),
+        DECLARE_NAPI_FUNCTION("stringUtf16OfCase", StringUtf16OfCase),
+        DECLARE_NAPI_FUNCTION("createAndGetStringUtf16", CreateAndGetStringUtf16),
         { "napiCancelAsyncWork", nullptr, napiCancelAsyncWork, nullptr, nullptr, nullptr, napi_default, nullptr },
         { "testAsyncWork", nullptr, testAsyncWork, nullptr, nullptr, nullptr, napi_default, nullptr },
         { "testPromise", nullptr, testPromise, nullptr, nullptr, nullptr, napi_default, nullptr },
diff --git a/arkui/ace_napi_test/entry/src/main/ets/test/NativeApiStringTest.ets b/arkui/ace_napi_test/entry/src/main/ets/test/NativeApiStringTest.ets
index ad8d6d03d63a3510bd31e6fa6c3a917a55f6097a..d2e374f0c51ef1a98d26e0b051dc30888ae13a23 100644
--- a/arkui/ace_napi_test/entry/src/main/ets/test/NativeApiStringTest.ets
+++ b/arkui/ace_napi_test/entry/src/main/ets/test/NativeApiStringTest.ets
@@ -1339,5 +1339,89 @@ export default function nativeApiStringJsunit() {
       expect(value).assertEqual(0);
       done();
     });
+
+    /**
+    * @tc.number    SUB_ACE_BASIC_ETS_NAPI_0093
+    * @tc.name      aceNapiTest093
+    * @tc.desc      aceNapiEtsTest
+    */
+    it('aceNapiTest093', 0, async function (done) {
+      console.info('aceNapiTest093 START');
+      let value = napitest.createAndGetStringUtf16('he');
+      console.info('aceNapiTest093 testString result is: ' + value + "--" + JSON.stringify(value));
+      let value1 = napitest.stringUtf16OfCase('abc2r42');
+      console.info('aceNapiTest093 testString result is: ' + value1 + "--" + JSON.stringify(value1));
+      expect(value).assertEqual('he');
+      expect(value1).assertEqual('abc2');
+      done();
+    });
+
+    /**
+    * @tc.number    SUB_ACE_BASIC_ETS_NAPI_0094
+    * @tc.name      aceNapiTest094
+    * @tc.desc      aceNapiEtsTest
+    */
+    it('aceNapiTest094', 0, async function (done) {
+      console.info('aceNapiTest094 START');
+      let valueeEmpty = napitest.createAndGetStringUtf16(' ');
+      console.info('aceNapiTest094 testString result is: ' + valueeEmpty + "--" + JSON.stringify(valueeEmpty));
+      expect(valueeEmpty).assertEqual(' ');
+      done();
+    });
+
+    /**
+    * @tc.number    SUB_ACE_BASIC_ETS_NAPI_0095
+    * @tc.name      aceNapiTest095
+    * @tc.desc      aceNapiEtsTest
+    */
+    it('aceNapiTest095', 0, async function (done) {
+      console.info('aceNapiTest095 START');
+      let obj1 = napitest.typeTaggedInstance(0);
+      let obj2 = napitest.typeTaggedInstance(1);
+      let obj3 = napitest.typeTaggedInstance(2);
+      let obj4 = napitest.typeTaggedInstance(3);
+      let isTag = napitest.checkTypeTag(0, obj1);
+      let isTag1 = napitest.checkTypeTag(1, obj2);
+      let isTag2 = napitest.checkTypeTag(2, obj3);
+      let isTag3 = napitest.checkTypeTag(3, obj4);
+      console.info('aceNapiTest095 testTypeTag result is: ' + isTag + "--" + JSON.stringify(isTag));
+      expect(isTag).assertTrue();
+      console.info('aceNapiTest095 testTypeTag result is: ' + isTag1 + "--" + JSON.stringify(isTag1));
+      expect(isTag1).assertTrue();
+      console.info('aceNapiTest095 testTypeTag result is: ' + isTag2 + "--" + JSON.stringify(isTag2));
+      expect(isTag2).assertTrue();
+      console.info('aceNapiTest095 testTypeTag result is: ' + isTag3 + "--" + JSON.stringify(isTag3));
+      expect(isTag3).assertTrue();
+      done();
+    });
+
+    /**
+    * @tc.number    SUB_ACE_BASIC_ETS_NAPI_0096
+    * @tc.name      aceNapiTest096
+    * @tc.desc      aceNapiEtsTest
+    */
+    it('aceNapiTest096', 0, async function (done) {
+      console.info('aceNapiTest096 START');
+      let obj1 = napitest.typeTaggedInstance(0);
+      let obj2 = napitest.typeTaggedInstance(1);
+      let obj3 = napitest.typeTaggedInstance(2);
+      let obj4 = napitest.typeTaggedInstance(3);
+      let isTag = napitest.checkTypeTag(1, obj1);
+      let isTag1 = napitest.checkTypeTag(0, obj2);
+      let isTag2 = napitest.checkTypeTag(1, obj4);
+      let isTag3 = napitest.checkTypeTag(3, obj3);
+      let isTag4 = napitest.checkTypeTag(4, obj3);
+      console.info('aceNapiTest096 testTypeTag result is: ' + isTag + "--" + JSON.stringify(isTag));
+      expect(isTag).assertFalse();
+      console.info('aceNapiTest096 testTypeTag result is: ' + isTag1 + "--" + JSON.stringify(isTag1));
+      expect(isTag1).assertFalse();
+      console.info('aceNapiTest096 testTypeTag result is: ' + isTag2 + "--" + JSON.stringify(isTag2));
+      expect(isTag2).assertFalse();
+      console.info('aceNapiTest096 testTypeTag result is: ' + isTag3 + "--" + JSON.stringify(isTag3));
+      expect(isTag3).assertFalse();
+      console.info('aceNapiTest096 testTypeTag result is: ' + isTag4 + "--" + JSON.stringify(isTag4));
+      expect(isTag4).assertFalse();
+      done();
+    });
   })
 }