diff --git a/backend/app/services/oasis_profile_generator.py b/backend/app/services/oasis_profile_generator.py
index cac49f7..e4d9e9a 100644
--- a/backend/app/services/oasis_profile_generator.py
+++ b/backend/app/services/oasis_profile_generator.py
@@ -277,9 +277,9 @@ class OasisProfileGenerator:
         """Generate a username from the entity name"""
         # Keep Unicode characters (Thai, Chinese, etc) and convert to lowercase
         username = name.lower().replace(" ", "_")
-        # Only remove truly problematic characters for usernames
+        # Remove characters that are NOT: Thai (\u0E00-\u0E7F), ASCII alphanumeric, or underscore
         import re
-        username = re.sub(r'[^\w]', '', username, flags=re.UNICODE)
+        username = re.sub(r'[^\u0E00-\u0E7Fa-zA-Z0-9_]', '', username)
         
         # Add random suffix to avoid duplicates
         suffix = random.randint(100, 999)
diff --git a/backend/scripts/run_parallel_simulation.py b/backend/scripts/run_parallel_simulation.py
index e3774e1..898d520 100644
--- a/backend/scripts/run_parallel_simulation.py
+++ b/backend/scripts/run_parallel_simulation.py
@@ -1028,6 +1028,7 @@ def create_model(config: Dict[str, Any], use_boost: bool = False):
     
     if llm_base_url:
         os.environ["OPENAI_BASE_URL"] = llm_base_url
+        os.environ["OPENAI_API_BASE_URL"] = llm_base_url
     
     print(f"{config_label} model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
     
diff --git a/backend/scripts/run_reddit_simulation.py b/backend/scripts/run_reddit_simulation.py
index 803bc66..156db9d 100644
--- a/backend/scripts/run_reddit_simulation.py
+++ b/backend/scripts/run_reddit_simulation.py
@@ -458,6 +458,7 @@ class RedditSimulationRunner:
         
         if llm_base_url:
             os.environ["OPENAI_BASE_URL"] = llm_base_url
+            os.environ["OPENAI_API_BASE_URL"] = llm_base_url
         
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")
         
diff --git a/backend/scripts/run_twitter_simulation.py b/backend/scripts/run_twitter_simulation.py
index 34d50dd..4c886ff 100644
--- a/backend/scripts/run_twitter_simulation.py
+++ b/backend/scripts/run_twitter_simulation.py
@@ -451,6 +451,7 @@ class TwitterSimulationRunner:
         
         if llm_base_url:
             os.environ["OPENAI_BASE_URL"] = llm_base_url
+            os.environ["OPENAI_API_BASE_URL"] = llm_base_url
         
         print(f"LLM配置: model={llm_model}, base_url={llm_base_url[:40] if llm_base_url else '默认'}...")