diff --git a/data_platform/updater.py b/data_platform/updater.py
index 818c9b42..0044a88e 100644
--- a/data_platform/updater.py
+++ b/data_platform/updater.py
@@ -58,51 +58,40 @@ def get_last_date(code: str, exchange: str) -> str:
 
 
 def fetch_incremental(code: str, start_date: str, end_date: str):
-    """获取增量数据：先试akshare，失败用腾讯K线"""
-    # 1. akshare
+    """获取增量数据：腾讯K线（主源，稳定无代理问题）"""
+    # 直接用腾讯K线API（akshare有代理问题，作为降级备源）
     try:
-        import akshare as ak
-        df = ak.stock_zh_a_hist(
-            symbol=code, period="daily",
-            start_date=start_date.replace("-", ""),
-            end_date=end_date.replace("-", ""),
-            adjust=""
-        )
-        if df is not None and not df.empty:
-            df = df.rename(columns={"日期": "date", "开盘": "open", "收盘": "close",
-                                     "最高": "high", "最低": "low", "成交量": "volume",
-                                     "成交额": "amount"})
-            df["date"] = pd.to_datetime(df["date"]).dt.strftime("%Y-%m-%d")
-            for c in ["open", "high", "low", "close", "volume", "amount"]:
-                df[c] = pd.to_numeric(df[c], errors="coerce").fillna(0)
-            return df[["date", "open", "high", "low", "close", "volume", "amount"]]
-    except Exception as e:
-        pass  # akshare失败，静默切到腾讯
-
-    # 2. 腾讯K线API
-    try:
-        import urllib.request, json
+        import urllib.request
+        import json as _json
         prefix = 'sh' if code.startswith(('6', '5', '1')) else 'sz'
         tq = f"{prefix}{code}"
         days = (pd.Timestamp(end_date) - pd.Timestamp(start_date)).days + 10
         url = f"https://web.ifzq.gtimg.cn/appstock/app/fqkline/get?param={tq},day,,{days},"
         # 用无代理opener避免akshare代理污染
-        opener = urllib.request.build_opener(urllib.request.ProxyHandler({}))
+        proxy_handler = urllib.request.ProxyHandler({})
+        opener = urllib.request.build_opener(proxy_handler)
         req = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
-        with opener.open(req, timeout=10) as r:
-            data = json.loads(r.read())
-        klines = data.get("data", {}).get(tq, {}).get("day", [])
+        resp = opener.open(req, timeout=10)
+        raw = resp.read().decode('utf-8', errors='replace')
+        data = _json.loads(raw)
+        d = data.get('data')
+        if not isinstance(d, dict):
+            return None
+        klines = d.get(tq, {}).get('day', [])
         if not klines:
             return None
-        df = pd.DataFrame(klines, columns=["date", "open", "close", "high", "low", "volume"])
-        for c in ["open", "close", "high", "low", "volume"]:
-            df[c] = pd.to_numeric(df[c], errors="coerce").fillna(0)
-        df["amount"] = 0.0
-        df["date"] = pd.to_datetime(df["date"]).dt.strftime("%Y-%m-%d")
-        mask = (df["date"] >= start_date) & (df["date"] <= end_date)
-        return df.loc[mask, ["date", "open", "high", "low", "close", "volume", "amount"]]
+        df = pd.DataFrame(klines, columns=['date', 'open', 'close', 'high', 'low', 'volume'])
+        for c in ['open', 'close', 'high', 'low', 'volume']:
+            df[c] = pd.to_numeric(df[c], errors='coerce').fillna(0)
+        df['amount'] = 0.0
+        df['date'] = pd.to_datetime(df['date']).dt.strftime('%Y-%m-%d')
+        mask = (df['date'] >= start_date) & (df['date'] <= end_date)
+        result = df.loc[mask, ['date', 'open', 'high', 'low', 'close', 'volume', 'amount']]
+        if result.empty:
+            return None
+        return result
     except Exception as e:
-        logger.warning(f"腾讯K线也失败 {code}: {e}")
+        logger.warning(f'腾讯K线失败 {code}: {e}')
         return None