diff --git a/betocq/constants.py b/betocq/constants.py
index bf26e7a..ce33531 100644
--- a/betocq/constants.py
+++ b/betocq/constants.py
@@ -165,9 +165,9 @@ class TestParameters:
   wifi_chipset_model: str = ''
   # check if the test is running in debug mode.
   debug_mode: bool = False
-  # Ignore the indoor 5g test for china ap, as China AP has no 5g channel
-  # for Japan country code.
-  ignore_indoor_5g_test_for_china_ap: bool = False
+  # Ignore the indoor 5g test for China tri-band AP, as China tri-band AP only
+  # can use UNII-3 band for 5G wifi, which is not supported by Japan devices.
+  ignore_indoor_5g_test_for_china_triband_ap: bool = False
 
   @classmethod
   def from_user_params(cls, user_params: dict[str, Any]) -> 'TestParameters':
@@ -863,6 +863,7 @@ class NcTestRuntime:
   iperf_to_d2d_throughput_ratio: float = IPERF_TO_D2D_THROUGHPUT_RATIO_DEF
   is_discoverer_network_owner: bool = False
   wlan_throughput_cap_mbps: float = WLAN_MEDIUM_THROUGHPUT_CAP_MBPS
+  all_tests_should_be_skipped: bool = False
 
 
 @dataclasses.dataclass(frozen=True)
diff --git a/betocq/nearby_connection/betocq_aqt_test_suite.py b/betocq/nearby_connection/betocq_aqt_test_suite.py
index c6c0b7f..5c6d9cc 100644
--- a/betocq/nearby_connection/betocq_aqt_test_suite.py
+++ b/betocq/nearby_connection/betocq_aqt_test_suite.py
@@ -43,7 +43,7 @@
 # increment this version number when adding new tests or changing the config
 # parameters of existing tests.
 # LINT.IfChange(suite_version)
-_SUITE_VERSION = '8'
+_SUITE_VERSION = '9'
 # LINT.ThenChange()
 
 
@@ -96,12 +96,9 @@ def setup_suite(self, config):
     # 5G STA
     self.add_test_class(scc_5g_wfd_sta_test.Scc5gWfdStaTest)
     self.add_test_class(scc_5g_wlan_sta_test.Scc5gWifiLanStaTest)
-    self.add_test_class(xcc_wfd_ww_5g_sta_test.XccWfdWw5gStaTest)
     # 5G DFS STA
-    self.add_test_class(xcc_hotspot_dfs_5g_sta_test.XccHotspotDfs5gStaTest)
     self.add_test_class(xcc_wfd_dfs_5g_sta_test.XccWfdDfs5gStaTest)
     # 2G STA
-    self.add_test_class(xcc_2g_wfd_sta_test.Xcc2gWfdStaTest)
     self.add_test_class(scc_2g_wlan_sta_test.Scc2gWlanStaTest)
     self.add_test_class(xcc_wfd_dbs_2g_sta_test.XccWfdDbs2gStaTest)
     # Compound test cases:
diff --git a/betocq/nearby_connection/directed_tests/mcc_5g_hotspot_dfs_5g_sta_test.py b/betocq/nearby_connection/directed_tests/mcc_5g_hotspot_dfs_5g_sta_test.py
index 0a8141e..2fb14c1 100644
--- a/betocq/nearby_connection/directed_tests/mcc_5g_hotspot_dfs_5g_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/mcc_5g_hotspot_dfs_5g_sta_test.py
@@ -35,7 +35,7 @@
     wifi channel: 52 (5260) or 112 (5560) or other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
diff --git a/betocq/nearby_connection/directed_tests/mcc_5g_wfd_dfs_5g_sta_test.py b/betocq/nearby_connection/directed_tests/mcc_5g_wfd_dfs_5g_sta_test.py
index 77de84d..f33adfd 100644
--- a/betocq/nearby_connection/directed_tests/mcc_5g_wfd_dfs_5g_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/mcc_5g_wfd_dfs_5g_sta_test.py
@@ -31,7 +31,7 @@
     wifi channel: 52 (5260) or 112 (5560) or other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
diff --git a/betocq/nearby_connection/directed_tests/scc_2g_wfd_sta_test.py b/betocq/nearby_connection/directed_tests/scc_2g_wfd_sta_test.py
index 8dd9522..687dbde 100644
--- a/betocq/nearby_connection/directed_tests/scc_2g_wfd_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/scc_2g_wfd_sta_test.py
@@ -15,7 +15,7 @@
 """This test is to test the Wifi SCC in a general case.
 
 In this case, both the WFD and STA are using the same 2G channel.
-Note that the country code is set to JP so that 5G is not available for
+Note that the country code is set to '00' so that 5G is not available for
 any D2D mediums.
 
 Test requirements:
@@ -202,8 +202,11 @@ def test_scc_2g_wfd_sta(self):
         self.test_runtime.is_dbs_mode,
         sta_frequency=self.current_test_result.sta_frequency,
         additional_error_message=(
-            'The device violates the regulation of Wi-Fi 5G indoor channel.'
-            'You may work with the chipset vendor.'
+            'In world wide country code, WFD should use the 2G channel, but'
+            ' the device is using the 5G channel. if the device does not'
+            ' follow the world wide country code wifi channel. You may work'
+            ' with your wifi chipset vendor to fix this frequency selection'
+            ' issue.'
         ),
     )
 
diff --git a/betocq/nearby_connection/directed_tests/scc_dfs_5g_hotspot_sta_test.py b/betocq/nearby_connection/directed_tests/scc_dfs_5g_hotspot_sta_test.py
index 79af8ee..1e58ddb 100644
--- a/betocq/nearby_connection/directed_tests/scc_dfs_5g_hotspot_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/scc_dfs_5g_hotspot_sta_test.py
@@ -35,7 +35,7 @@
     wifi channel: 52 (5260) or 112 (5560) or other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
@@ -77,7 +77,7 @@
 _FILE_TRANSFER_SIZE_KB = constants.TRANSFER_FILE_SIZE_500MB
 _FILE_TRANSFER_TIMEOUT = constants.WIFI_500M_PAYLOAD_TRANSFER_TIMEOUT
 _PAYLOAD_TYPE = constants.PayloadType.FILE
-_COUNTRY_CODE = 'GB'
+_COUNTRY_CODE = 'US'
 
 
 _THROUGHPUT_LOW_TIP = (
diff --git a/betocq/nearby_connection/directed_tests/scc_dfs_5g_wfd_sta_test.py b/betocq/nearby_connection/directed_tests/scc_dfs_5g_wfd_sta_test.py
index ca63259..c7e65bd 100644
--- a/betocq/nearby_connection/directed_tests/scc_dfs_5g_wfd_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/scc_dfs_5g_wfd_sta_test.py
@@ -30,7 +30,7 @@
     wifi channel: 52 (5260) or 112 (5560) or any other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
@@ -72,7 +72,7 @@
 _FILE_TRANSFER_SIZE_KB = constants.TRANSFER_FILE_SIZE_500MB
 _FILE_TRANSFER_TIMEOUT = constants.WIFI_500M_PAYLOAD_TRANSFER_TIMEOUT
 _PAYLOAD_TYPE = constants.PayloadType.FILE
-_COUNTRY_CODE = 'GB'
+_COUNTRY_CODE = 'US'
 
 
 _THROUGHPUT_LOW_TIP = (
diff --git a/betocq/nearby_connection/directed_tests/scc_indoor_5g_wfd_sta_test.py b/betocq/nearby_connection/directed_tests/scc_indoor_5g_wfd_sta_test.py
index 5aa3b7b..c759130 100644
--- a/betocq/nearby_connection/directed_tests/scc_indoor_5g_wfd_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/scc_indoor_5g_wfd_sta_test.py
@@ -101,8 +101,8 @@ class SccIndoor5gWfdStaTest(performance_test_base.PerformanceTestBase):
   def setup_class(self):
     super().setup_class()
     asserts.skip_if(
-        self.test_parameters.ignore_indoor_5g_test_for_china_ap,
-        'Skip indoor 5g test for China AP',
+        self.test_parameters.ignore_indoor_5g_test_for_china_triband_ap,
+        'Skip indoor 5g test for China tri-band AP',
     )
 
     self.setup_wifi_env(
diff --git a/betocq/nearby_connection/directed_tests/xcc_hotspot_dfs_5g_sta_test.py b/betocq/nearby_connection/directed_tests/xcc_hotspot_dfs_5g_sta_test.py
index ca2fa21..c85bee7 100644
--- a/betocq/nearby_connection/directed_tests/xcc_hotspot_dfs_5g_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/xcc_hotspot_dfs_5g_sta_test.py
@@ -36,7 +36,7 @@
     wifi channel: 52 (5260) or 112 (5560) or other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
diff --git a/betocq/nearby_connection/directed_tests/xcc_wfd_dfs_5g_sta_test.py b/betocq/nearby_connection/directed_tests/xcc_wfd_dfs_5g_sta_test.py
index ffd21a4..b3b6128 100644
--- a/betocq/nearby_connection/directed_tests/xcc_wfd_dfs_5g_sta_test.py
+++ b/betocq/nearby_connection/directed_tests/xcc_wfd_dfs_5g_sta_test.py
@@ -32,7 +32,7 @@
     wifi channel: 52 (5260) or 112 (5560) or other DFS channels.
 
 Test preparations:
-  Set country code to GB on Android devices.
+  Set country code to US on Android devices.
 
 Test steps:
   1. Disconnect discoverer from the current connected Wi-Fi network.
@@ -53,6 +53,7 @@
 
 import time
 
+from mobly import asserts
 from mobly import base_test
 from mobly import test_runner
 from mobly import utils
@@ -166,6 +167,11 @@ def test_xcc_wfd_dfs_5g_sta(self) -> None:
     supported) and MCC (otherwise) scenarios.
     """
     # Test Step: Disconnect discoverer from the current connected wifi sta.
+    if getattr(self.test_runtime, 'all_tests_should_be_skipped', False):
+      asserts.skip(
+          'medium_frequency is equal to sta_frequency, skipping all following'
+          ' iterations. duplicate test case with SCC_5G_WFD_STA_TEST.'
+      )
     discoverer_sta_op = setup_utils.remove_current_connected_wifi_network(
         self.discoverer
     )
@@ -236,6 +242,19 @@ def test_xcc_wfd_dfs_5g_sta(self) -> None:
         self.current_test_result.sta_frequency,
         wifi_concurrency_mode.name,
     )
+    if (
+        self.current_test_result.quality_info.medium_frequency
+        == self.current_test_result.sta_frequency
+        and self.current_test_result.sta_frequency is not constants.INVALID_INT
+    ):
+      self.test_runtime.all_tests_should_be_skipped = True
+      prior_bt_snippet.disconnect_endpoint()
+      active_snippet.disconnect_endpoint()
+
+      asserts.skip(
+          'medium_frequency is equal to sta_frequency, skipping all following'
+          ' iterations. duplicate test case with SCC_5G_WFD_STA_TEST.'
+      )
 
     file_transfer_size_kb = (
         nc_constants.NC_MCC_5G_D2D_5G_STA_TRANSFER_FILE_SIZE_KB
diff --git a/betocq/performance_test_base.py b/betocq/performance_test_base.py
index 62e5a00..85a28c4 100644
--- a/betocq/performance_test_base.py
+++ b/betocq/performance_test_base.py
@@ -97,7 +97,16 @@ def teardown_class(self):
             self.TAG: final_result_message,
         },
     })
+    test_runtime = getattr(
+        self, 'test_runtime', getattr(self, 'test_runtime', None)
+    )
+    if getattr(test_runtime, 'all_tests_should_be_skipped', False):
+      logging.info(
+          'Skipping result assertion in teardown class because all test'
+          ' iterations are skipped.'
+      )
+    else:
+      passed = self.test_results.is_test_class_passed()
+      asserts.assert_true(passed, final_result_message)
 
-    passed = self.test_results.is_test_class_passed()
-    asserts.assert_true(passed, final_result_message)
     super().teardown_class()
diff --git a/betocq/test_result_utils.py b/betocq/test_result_utils.py
index 8c429db..12c454c 100644
--- a/betocq/test_result_utils.py
+++ b/betocq/test_result_utils.py
@@ -1051,6 +1051,10 @@ def get_wifi_concurrency_mode(self) -> constants.WifiConcurrencyMode:
 
   def get_test_class_result_message(self) -> str:
     """Gets the test result message for the test class based on result enum."""
+    if self.nc_test_runtime and getattr(
+        self.nc_test_runtime, 'all_tests_should_be_skipped', False
+    ):
+      return 'SKIP'
     finished_iteration_count = len(self._results)
     if finished_iteration_count == 0:
       return 'FAIL: Test did not execute any iterations. Zero finished tests.'
diff --git a/betocq/version.py b/betocq/version.py
index 3daa9e6..3766db1 100644
--- a/betocq/version.py
+++ b/betocq/version.py
@@ -37,4 +37,4 @@
 # '2.6.2': ('Optimize tests for AQT and fix some bugs.')
 # '2.6.3': ('Fix some bugs.')
 # '2.6.4': 'Replace the SCC 2G WFD STA test with XCC 2G WFD STA test.'
-# '2.6.5': ('Making the test compatible with the China version of the AP.')
+# '2.6.5': 'Reduce the test cases for AQT and fix some bugs.'