diff --git a/src/fetcher/kline_fetcher.py b/src/fetcher/kline_fetcher.py
index c5d18c8..523ea58 100644
--- a/src/fetcher/kline_fetcher.py
+++ b/src/fetcher/kline_fetcher.py
@@ -60,9 +60,17 @@ class KlineFetcher:
                 except Exception as e2:
                     raise e2 from e
         else:
-            df = ak.stock_zh_a_hist_min_em(symbol=code, period=cfg['ak_period'],
-                                           start_date=start + ' 09:30:00',
-                                           end_date=end + ' 15:00:00')
+            try:
+                df = ak.stock_zh_a_hist_min_em(symbol=code, period=cfg['ak_period'],
+                                               start_date=start + ' 09:30:00',
+                                               end_date=end + ' 15:00:00')
+            except Exception as em_err:
+                # EM 分钟线被限速时回退新浪分钟线（仅 5/15/30/60 分钟）
+                sym = ('sh' if code[:1] == '6' else 'sz') + code
+                try:
+                    df = ak.stock_zh_a_minute(symbol=sym, period=cfg['ak_period'], adjust='')
+                except Exception as e2:
+                    raise e2 from em_err
         if df is None or df.empty:
             return pd.DataFrame()
         df.columns = [str(c).lower() for c in df.columns]
diff --git a/src/web/server.py b/src/web/server.py
index 79690e3..ee88d4c 100644
--- a/src/web/server.py
+++ b/src/web/server.py
@@ -22,6 +22,7 @@ from src.analysis.event_impact import EventImpactService   # noqa: E402
 from src.quant.engine import QuantEngine   # noqa: E402
 
 PORT = int(os.environ.get('PORT', '8100'))
+SCORING_INTERVAL_S = int(os.environ.get('QUANT_SCORING_INTERVAL_S', '1800'))
 ROOT = Path(__file__).resolve().parent.parent.parent
 WEB_DIR = Path(__file__).resolve().parent
 RECENT_MAX = 500