diff --git a/mikazuki/launch_utils.py b/mikazuki/launch_utils.py
index 42b3f01..282db7a 100644
--- a/mikazuki/launch_utils.py
+++ b/mikazuki/launch_utils.py
@@ -202,10 +202,10 @@ def setup_windows_bitsandbytes():
         return
 
     # bnb_windows_index = os.environ.get("BNB_WINDOWS_INDEX", "https://jihulab.com/api/v4/projects/140618/packages/pypi/simple")
-    bnb_package = "bitsandbytes==0.44.0"
+    bnb_package = "bitsandbytes==0.45.3"
     bnb_path = os.path.join(sysconfig.get_paths()["purelib"], "bitsandbytes")
 
-    installed_bnb = is_installed(bnb_package)
+    installed_bnb = is_installed("bitsandbytes") # don't check version here
     bnb_cuda_setup = len([f for f in os.listdir(bnb_path) if re.findall(r"libbitsandbytes_cuda.+?\.dll", f)]) != 0
 
     if not installed_bnb or not bnb_cuda_setup:
@@ -259,6 +259,22 @@ def check_run(file: str) -> bool:
     return result.returncode == 0
 
 
+def network_gfw_test(timeout=3):
+    try:
+        import requests
+        # requests will auto detect system proxies
+        response = requests.get("https://www.google.com", timeout=timeout)
+        if response.status_code == 200:
+            log.info("Network test passed")
+            return True
+        else:
+            log.error(f"Network test failed: {response.status_code}")
+            return False
+    except requests.exceptions.RequestException as e:
+        log.error(f"Network test failed: {e}")
+        return False
+
+
 def prepare_environment(disable_auto_mirror: bool = True):
     if sys.platform == "win32":
         # disable triton on windows
@@ -269,8 +285,8 @@ def prepare_environment(disable_auto_mirror: bool = True):
     os.environ["PYTHONWARNINGS"] = "ignore::UserWarning"
     os.environ["PIP_DISABLE_PIP_VERSION_CHECK"] = "1"
 
-    if not disable_auto_mirror and locale.getdefaultlocale()[0] == "zh_CN":
-        log.info("detected locale zh_CN, use pip & huggingface mirrors")
+    if not disable_auto_mirror and not network_gfw_test():
+        log.info("use pip & huggingface mirrors")
         os.environ.setdefault("PIP_FIND_LINKS", "https://mirror.sjtu.edu.cn/pytorch-wheels/torch_stable.html")
         os.environ.setdefault("PIP_INDEX_URL", "https://pypi.tuna.tsinghua.edu.cn/simple")
         os.environ.setdefault("HF_ENDPOINT", "https://hf-mirror.com")