diff --git a/vnpy/gateway/onetoken/onetoken_gateway.py b/vnpy/gateway/onetoken/onetoken_gateway.py
index 22a5bb5d..f2e9136e 100644
--- a/vnpy/gateway/onetoken/onetoken_gateway.py
+++ b/vnpy/gateway/onetoken/onetoken_gateway.py
@@ -260,7 +260,7 @@ class OnetokenRestApi(RestClient):
             symbol = instrument_data["name"]
             contract = ContractData(
                 symbol=symbol,
-                exchange=Exchange.OKEX,  # todo
+                exchange=Exchange(instrument_data['symbol'].split('/')[0].upper()),
                 name=symbol,
                 product=Product.SPOT,  # todo
                 size=float(instrument_data["min_amount"]),