diff --git a/tutorials/benchmarks/grad/mindquantum_grad.py b/tutorials/benchmarks/grad/mindquantum_grad.py
index c0ceb1b..ac3b6e7 100644
--- a/tutorials/benchmarks/grad/mindquantum_grad.py
+++ b/tutorials/benchmarks/grad/mindquantum_grad.py
@@ -19,7 +19,7 @@ from _parse_args import parser
 args = parser.parse_args()
 os.environ['OMP_NUM_THREADS'] = str(args.omp_num_threads)
 import numpy as np
-from hiqfermion.ops import QubitOperator
+from mindquantum.ops import QubitOperator
 from mindquantum import Circuit, X, H, XX, ZZ, RX, Hamiltonian
 from mindquantum.nn import generate_pqc_operator
 import mindspore.context as context
diff --git a/tutorials/benchmarks/qaoa/qaoa_mindquantum.py b/tutorials/benchmarks/qaoa/qaoa_mindquantum.py
index 03098fb..9f319df 100644
--- a/tutorials/benchmarks/qaoa/qaoa_mindquantum.py
+++ b/tutorials/benchmarks/qaoa/qaoa_mindquantum.py
@@ -53,7 +53,7 @@ p = 4
 ITR = 120
 LR = 0.1
 
-ham = 0
+ham = QubitOperator()
 for (v, u) in E:
     ham += QubitOperator('Z{} Z{}'.format(v, u), -1.0)
 ham = Hamiltonian(ham)