diff --git a/vnpy_tushare/tushare_datafeed.py b/vnpy_tushare/tushare_datafeed.py
index 21e029c..f429459 100644
--- a/vnpy_tushare/tushare_datafeed.py
+++ b/vnpy_tushare/tushare_datafeed.py
@@ -246,8 +246,8 @@ def query_bar_history(self, req: HistoryRequest) -> Optional[List[BarData]]:
                     low_price=round_to(row["low"], 0.000001),
                     close_price=round_to(row["close"], 0.000001),
                     volume=row["vol"],
-                    turnover=row.get("amount", 0),
-                    open_interest=row.get("oi", 0),
+                    turnover=row.get("amount", 0) if row.get("amount", 0) else 0,
+                    open_interest=row.get("oi", 0) if row.get("oi", 0) else 0,
                     gateway_name="TS"
                 )