diff --git a/.env.example b/.env.example
index 7fe27f3..099e721 100644
--- a/.env.example
+++ b/.env.example
@@ -19,7 +19,7 @@ NOTIFY_EMAIL=notify@example.com
 PUSH_ENABLED=false
 PUSH_API_URL=https://uniservice.server.hnxinyouhe.com/open/v1/inquiry/push
 PUSH_API_KEY=your_uniservice_api_key_here
-PUSH_EXTERNAL_KEY_PREFIX=ai-kefu
+PUSH_EXTERNAL_KEY_PREFIX=ai-kefu-jc
 
 # 应用配置
 APP_HOST=0.0.0.0
diff --git a/app/config.py b/app/config.py
index 35c8013..6b715b7 100644
--- a/app/config.py
+++ b/app/config.py
@@ -26,7 +26,7 @@ class Settings(BaseSettings):
     PUSH_ENABLED: bool = False
     PUSH_API_URL: str = "https://uniservice.server.hnxinyouhe.com/open/v1/inquiry/push"
     PUSH_API_KEY: str = ""
-    PUSH_EXTERNAL_KEY_PREFIX: str = "ai-kefu"
+    PUSH_EXTERNAL_KEY_PREFIX: str = "ai-kefu-jc"
     PUSH_TIMEOUT_SECONDS: float = 10.0
     PUSH_MAX_ATTEMPTS: int = 3
     PUSH_RETRY_BACKOFF_BASE: float = 1.0   # 尝试间隔 1s/2s(3 次尝试、2 次间隔)
diff --git a/tests/test_contact_pipeline.py b/tests/test_contact_pipeline.py
index c3bdc01..f705abe 100644
--- a/tests/test_contact_pipeline.py
+++ b/tests/test_contact_pipeline.py
@@ -139,7 +139,7 @@ def test_scan_full_history_not_only_last():
         {"role": "assistant", "content": "hey"},
         {"role": "user", "content": "mail me a@b.com"},
         {"role": "assistant", "content": "got it"},
-        {"role": "user", "content": "how much is tang"},
+        {"role": "user", "content": "how much is pvc"},
     ]
     assert scan_user_messages(msgs) == {"email": "a@b.com"}
 
diff --git a/tests/test_lead_email_trigger.py b/tests/test_lead_email_trigger.py
index 07a9431..10dd4f3 100644
--- a/tests/test_lead_email_trigger.py
+++ b/tests/test_lead_email_trigger.py
@@ -337,7 +337,7 @@ def test_widget_never_ends_without_contact_all_sources(async_db, monkeypatch):
     # D3/P1: widget 来源 interested+sufficient 但无联系方式 → 永不结束
     (manager, conv), _ = _setup(async_db, monkeypatch,
                                 ai=_mk_ai({}, evaluate=INTERESTED))
-    for text in ("hi", "kenya", "20k", "tang", "ship how"):
+    for text in ("hi", "kenya", "20k", "pvc", "ship how"):
         asyncio.run(_send(manager, conv.session_id, text))
     conv_now = asyncio.run(manager.get_by_session(conv.session_id))
     assert conv_now.status == ConversationStatus.active
@@ -437,7 +437,7 @@ def test_conversation_never_auto_ends_even_with_contact_and_interested(async_db,
     # 决策A(2026-08-18): 自动结束移除——即使 contact+interested+≥3轮也保持 active
     ai = _mk_ai({"联系方式": {"email": "a@b.com"}}, evaluate=INTERESTED)
     (manager, conv), _ = _setup(async_db, monkeypatch, ai=ai)
-    for text in ("hi", "kenya", "20k", "tang", "more questions"):
+    for text in ("hi", "kenya", "20k", "pvc", "more questions"):
         asyncio.run(_send(manager, conv.session_id, text))
     conv_now = asyncio.run(manager.get_by_session(conv.session_id))
     assert conv_now.status == ConversationStatus.active
@@ -525,7 +525,7 @@ def test_reminder_budget_routes_to_budget_playbook():
     assert "职能边界" in text and "反问意向" in text and "复述预算" in text
     # 纯问价 → 迂回话术,不含预算路径字样
     text2 = ConversationManager._build_context_reminder(
-        {}, "how much is the Tang?", [])
+        {}, "how much is the DN800?", [])
     assert "职能边界" in text2 and "反问意向" not in text2
 
 
@@ -537,7 +537,7 @@ class DirtyAI(FakeAI):
     """流出的回复里带真实价格(复刻冒烟实测的破防形态)。"""
 
     async def stream_chat(self, messages, context=""):
-        for token in ("the Tang starts at ", "$25k", " for the EV version"):
+        for token in ("the DN800 starts at ", "$25k", " per ton"):
             yield token
 
 
@@ -765,7 +765,7 @@ def test_no_contact_wall_already_contact_no_reask(async_db, monkeypatch):
         async_db, monkeypatch,
         ai=EchoAI(extract={}), source=ConversationSource.standalone)
     asyncio.run(_send(manager, conv.session_id, "my whatsapp is 254712 345678"))
-    asyncio.run(_send(manager, conv.session_id, "so how much is tang?"))
+    asyncio.run(_send(manager, conv.session_id, "so how much is pvc?"))
     msgs = asyncio.run(manager._load_history(conv.id))
     tail = [m["content"] for m in msgs if m["role"] == "assistant"][-1]
     # 精确断言(评审加固): 负向断言("WhatsApp?" not in)对三种替换句都空转通过,
@@ -809,7 +809,7 @@ def test_reask_wall_closed_without_contact(async_db, monkeypatch):
     (manager, conv), _ = _setup(async_db, monkeypatch,
                                 ai=AskAI(extract={}),
                                 source=ConversationSource.standalone)
-    asyncio.run(_send(manager, conv.session_id, "how much is the tang?"))
+    asyncio.run(_send(manager, conv.session_id, "how much is the PVC?"))
     msgs = asyncio.run(manager._load_history(conv.id))
     tail = [m["content"] for m in msgs if m["role"] == "assistant"][-1]
     assert "What's your WhatsApp or email?" in tail   # 合法索要未被丢
@@ -855,7 +855,7 @@ def test_e2e_no_reasking_after_contact_provided(async_db, monkeypatch):
     asyncio.run(_send(manager, conv.session_id, "hi there"))
     asyncio.run(_send(manager, conv.session_id,
                       "0712 345 678 is my whatsapp btw"))
-    asyncio.run(_send(manager, conv.session_id, "so how much is the Tang?"))
+    asyncio.run(_send(manager, conv.session_id, "so how much is the DN800?"))
     asyncio.run(_send(manager, conv.session_id, "and shipping to Kenya?"))
     # 第2轮起每轮提醒都必须含"已提供+禁止再索要"
     for ctx in ai.contexts[1:]:
diff --git a/tests/test_lead_push_service.py b/tests/test_lead_push_service.py
index 3053c5e..64a3cc6 100644
--- a/tests/test_lead_push_service.py
+++ b/tests/test_lead_push_service.py
@@ -40,7 +40,7 @@ def test_push_settings_defaults():
     assert s.PUSH_API_URL == (
         "https://uniservice.server.hnxinyouhe.com/open/v1/inquiry/push")
     assert s.PUSH_API_KEY == ""
-    assert s.PUSH_EXTERNAL_KEY_PREFIX == "ai-kefu"
+    assert s.PUSH_EXTERNAL_KEY_PREFIX == "ai-kefu-jc"  # 与汽车项目线索键空间隔离
     assert s.PUSH_TIMEOUT_SECONDS == 10.0
     assert s.PUSH_MAX_ATTEMPTS == 3
     assert s.PUSH_RETRY_BACKOFF_BASE == 1.0