diff --git a/milvus_client.py b/milvus_client.py
index ebe07c8..a84d36e 100644
--- a/milvus_client.py
+++ b/milvus_client.py
@@ -45,7 +45,7 @@ class MilvusClient(PyOperator):
         mr = self._collection.insert(row)
         if mr.err_count > 0:
             raise RuntimeError("Insert to milvus failed")
-        return None
+        return mr
 
     @property
     def shared_type(self):