diff --git a/tradingagents/agents/utils/memory.py b/tradingagents/agents/utils/memory.py
index 8f492137..092fb44b 100644
--- a/tradingagents/agents/utils/memory.py
+++ b/tradingagents/agents/utils/memory.py
@@ -1,3 +1,4 @@
+import os
 import chromadb
 from chromadb.config import Settings
 from openai import OpenAI
@@ -9,7 +10,9 @@ class FinancialSituationMemory:
             self.embedding = "nomic-embed-text"
         else:
             self.embedding = "text-embedding-3-small"
-        self.client = OpenAI(base_url=config["backend_url"])
+        # Get the OpenAI API key from environment variable
+        openai_api_key = os.getenv("OPENAI_API_KEY")
+        self.client = OpenAI(base_url=config["backend_url"], api_key=openai_api_key)
         self.chroma_client = chromadb.Client(Settings(allow_reset=True))
         self.situation_collection = self.chroma_client.create_collection(name=name)
 
diff --git a/tradingagents/dataflows/openai.py b/tradingagents/dataflows/openai.py
index 1aa43871..6174bbe0 100644
--- a/tradingagents/dataflows/openai.py
+++ b/tradingagents/dataflows/openai.py
@@ -1,3 +1,4 @@
+import os
 from openai import OpenAI
 from .config import get_config
 
@@ -15,7 +16,9 @@ def get_stock_news_openai(query, start_date, end_date):
         str: 模型的文字回應。
     """
     config = get_config()
-    client = OpenAI(base_url=config["backend_url"])
+    # Get the OpenAI API key from environment variable
+    openai_api_key = os.getenv("OPENAI_API_KEY")
+    client = OpenAI(base_url=config["backend_url"], api_key=openai_api_key)
 
     response = client.responses.create(
         model=config["quick_think_llm"],
@@ -61,7 +64,9 @@ def get_global_news_openai(curr_date, look_back_days=7, limit=5):
         str: 模型的文字回應。
     """
     config = get_config()
-    client = OpenAI(base_url=config["backend_url"])
+    # Get the OpenAI API key from environment variable
+    openai_api_key = os.getenv("OPENAI_API_KEY")
+    client = OpenAI(base_url=config["backend_url"], api_key=openai_api_key)
 
     response = client.responses.create(
         model=config["quick_think_llm"],
@@ -106,7 +111,9 @@ def get_fundamentals_openai(ticker, curr_date):
         str: 模型的文字回應。
     """
     config = get_config()
-    client = OpenAI(base_url=config["backend_url"])
+    # Get the OpenAI API key from environment variable
+    openai_api_key = os.getenv("OPENAI_API_KEY")
+    client = OpenAI(base_url=config["backend_url"], api_key=openai_api_key)
 
     response = client.responses.create(
         model=config["quick_think_llm"],
diff --git a/tradingagents/graph/conditional_logic.py b/tradingagents/graph/conditional_logic.py
index 51ffd226..6e647a55 100644
--- a/tradingagents/graph/conditional_logic.py
+++ b/tradingagents/graph/conditional_logic.py
@@ -108,7 +108,8 @@ class ConditionalLogic:
             state["investment_debate_state"]["count"] >= 2 * self.max_debate_rounds
         ):
             return "Research Manager"
-        if state["investment_debate_state"]["current_response"].startswith("Bull"):
+        # 檢查中文前綴（因為研究員使用中文格式化響應）
+        if state["investment_debate_state"]["current_response"].startswith("看漲"):
             return "Bear Researcher"
         return "Bull Researcher"