diff --git a/lite/core/mir/subgraph/subgraph_detector.cc b/lite/core/mir/subgraph/subgraph_detector.cc
index 99aedee511812e298af3b58ab91e0ffe5f3dbbf8..0af34219da915a327bd600676c57b64b2a1282b0 100644
--- a/lite/core/mir/subgraph/subgraph_detector.cc
+++ b/lite/core/mir/subgraph/subgraph_detector.cc
@@ -463,38 +463,6 @@ void SubgraphFuser::InsertNewNode(SSAGraph *graph,
                                                      idata_var_names);
   subgraph_op_desc.SetAttr<std::vector<std::string>>("output_data_names",
                                                      odata_var_names);
-
-  // Set input/output scale values of input/output var nodes for
-  // type_precision_cast_pass.
-  std::vector<float> input_data_scales;
-  std::vector<float> output_data_scales;
-  for (auto &var_node : idata_var_nodes) {
-    auto any_op_node = var_node->outlinks.front();
-    CHECK(any_op_node->IsStmt());
-    auto &any_inst = any_op_node->AsStmt();
-    if (any_inst.op_info()->HasAttr("input_scale")) {
-      input_data_scales.push_back(
-          any_inst.op_info()->GetAttr<float>("input_scale"));
-    }
-  }
-  for (auto &var_node : odata_var_nodes) {
-    auto any_op_node = var_node->inlinks.front();
-    CHECK(any_op_node->IsStmt());
-    auto &any_inst = any_op_node->AsStmt();
-    if (any_inst.op_info()->HasAttr("output_scale")) {
-      output_data_scales.push_back(
-          any_inst.op_info()->GetAttr<float>("output_scale"));
-    }
-  }
-  if (input_data_scales.size() > 0) {
-    subgraph_op_desc.SetAttr<std::vector<float>>("input_data_scales",
-                                                 input_data_scales);
-  }
-  if (output_data_scales.size() > 0) {
-    subgraph_op_desc.SetAttr<std::vector<float>>("output_data_scales",
-                                                 output_data_scales);
-  }
-
   // Set all of the inputs and outputs to the target subgraph op
   // To prevent vars are removed in RuntimeProgram::UpdateVarsOfProgram()
   std::vector<std::string> input_var_names;
diff --git a/lite/kernels/apu/bridges/softmax_op.cc b/lite/kernels/apu/bridges/softmax_op.cc
index 13aadcddc64c5cd46f722547d215a1f06ce21941..6a289ac987b9fa300cb548d190b6e46b67f24c44 100644
--- a/lite/kernels/apu/bridges/softmax_op.cc
+++ b/lite/kernels/apu/bridges/softmax_op.cc
@@ -104,7 +104,7 @@ int SoftmaxConverter(void* ctx, OpLite* op, KernelBase* kernel) {
   // Add out operand
   NeuronOperandType outType;
   outType.type = NEURON_TENSOR_QUANT8_ASYMM;
-  outType.scale = out_scale;
+  outType.scale = out_scale / 127;
   outType.zeroPoint = 128;
   outType.dimensionCount = x_dims.size();
   outType.dimensions = &dims_x[0];
diff --git a/lite/utils/string.h b/lite/utils/string.h
index e326c54b53d24793742a02c7abeed64fdb0fefe4..b1aaf5d6c56d8931c4ad416f9d38c947abc68dd8 100644
--- a/lite/utils/string.h
+++ b/lite/utils/string.h
@@ -60,6 +60,13 @@ static std::string to_string(const T& v) {
   return ss.str();
 }
 
+static std::string to_string(int index) {
+  const int BUFFER_LENGTH = 15;
+  char buffer[BUFFER_LENGTH];
+  snprintf(buffer, sizeof(buffer), "%d", index);
+  return std::string(buffer);
+}
+
 template <typename T = std::string>
 static T parse_string(const std::string& v) {
   return v;