diff --git a/vnpy/gateway/oes/oes_md.py b/vnpy/gateway/oes/oes_md.py
index fb5a1b84..25b94fbb 100644
--- a/vnpy/gateway/oes/oes_md.py
+++ b/vnpy/gateway/oes/oes_md.py
@@ -1,4 +1,5 @@
 import time
+from copy import copy
 from datetime import datetime
 from gettext import gettext as _
 from threading import Thread
@@ -146,7 +147,7 @@ class OesMdMessageLoop:
             tick.__dict__['bid_price_' + str(i + 1)] = data.BidLevels[i].Price / 10000
         for i in range(min(data.OfferPriceLevel, 5)):
             tick.__dict__['ask_price_' + str(i + 1)] = data.OfferLevels[i].Price / 10000
-        self.gateway.on_tick(tick)
+        self.gateway.on_tick(copy(tick))
 
     def on_market_full_refresh(self, d: MdsMktRspMsgBodyT):
         """"""
@@ -162,7 +163,7 @@ class OesMdMessageLoop:
             tick.__dict__['bid_price_' + str(i + 1)] = data.BidLevels[i].Price / 10000
         for i in range(5):
             tick.__dict__['ask_price_' + str(i + 1)] = data.OfferLevels[i].Price / 10000
-        self.gateway.on_tick(tick)
+        self.gateway.on_tick(copy(tick))
 
     def on_l2_trade(self, d: MdsMktRspMsgBodyT):
         """"""
@@ -172,7 +173,7 @@ class OesMdMessageLoop:
         tick.datetime = datetime.utcnow()
         tick.volume = data.TradeQty
         tick.last_price = data.TradePrice / 10000
-        self.gateway.on_tick(tick)
+        self.gateway.on_tick(copy(tick))
 
     def on_market_data_request(self, d: MdsMktRspMsgBodyT):
         """"""
diff --git a/vnpy/gateway/oes/oes_td.py b/vnpy/gateway/oes/oes_td.py
index b0d603c8..3878dbaf 100644
--- a/vnpy/gateway/oes/oes_td.py
+++ b/vnpy/gateway/oes/oes_td.py
@@ -1,4 +1,5 @@
 import time
+from copy import copy
 from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
 from gettext import gettext as _
@@ -210,7 +211,7 @@ class OesTdMessageLoop:
 
             vt_order.status = Status.REJECTED
 
-            self.gateway.on_order(vt_order)
+            self.gateway.on_order(copy(vt_order))
             self.gateway.write_log(
                 f"Order: {vt_order.vt_symbol}-{vt_order.vt_orderid} Code: {error_code} Rejected: {error_string}")
         else:
@@ -230,7 +231,7 @@ class OesTdMessageLoop:
         vt_order.traded = data.cumQty
         vt_order.time = parse_oes_datetime(data.ordDate, data.ordTime)
 
-        self.gateway.on_order(vt_order)
+        self.gateway.on_order(copy(vt_order))
 
     def on_order_report(self, d: OesRspMsgBodyT):
         """"""
@@ -247,7 +248,7 @@ class OesTdMessageLoop:
         vt_order.traded = data.cumQty
         vt_order.time = parse_oes_datetime(data.ordDate, data.ordCnfmTime)
 
-        self.gateway.on_order(vt_order)
+        self.gateway.on_order(copy(vt_order))
 
     def on_trade_report(self, d: OesRspMsgBodyT):
         """"""
@@ -273,7 +274,7 @@ class OesTdMessageLoop:
         vt_order.traded = data.cumQty
         vt_order.time = parse_oes_datetime(data.trdDate, data.trdTime)
         self.gateway.on_trade(trade)
-        self.gateway.on_order(vt_order)
+        self.gateway.on_order(copy(vt_order))
 
     def on_option_holding(self, d: OesRspMsgBodyT):
         """"""
@@ -692,7 +693,7 @@ class OesTdApi:
         vt_order.status = STATUS_OES2VT[data.ordStatus]
         vt_order.volume = data.ordQty - data.canceledQty
         vt_order.traded = data.cumQty
-        self.gateway.on_order(vt_order)
+        self.gateway.on_order(copy(vt_order))
         return 1
 
     def query_orders(self) -> bool:
@@ -718,7 +719,7 @@ class OesTdApi:
             vt_order.status = STATUS_OES2VT[data.ordStatus]
             vt_order.volume = data.ordQty - data.canceledQty
             vt_order.traded = data.cumQty
-            self.gateway.on_order(vt_order)
+            self.gateway.on_order(copy(vt_order))
         except KeyError:
             # order_id = self.order_manager.new_remote_id()
             order_id = data.clSeqNo
@@ -744,7 +745,7 @@ class OesTdApi:
                 time=datetime.utcnow().isoformat(),
             )
             self.save_order(order_id, vt_order)
-            self.gateway.on_order(vt_order)
+            self.gateway.on_order(copy(vt_order))
         return 1
 
     def save_order(self, order_id: int, order: OrderData):