diff --git a/README.md b/README.md
index c03f409..e6341da 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,3 @@
-
 ## What is bisheng-rt?
 
 bisheng-rt is an open source inference serving framework that power the model inference and resource allocation.
@@ -30,7 +29,7 @@ todo: update later
 
 ### Using from pre-builded image
 
-todo: upadte later
+todo: update later
 
 ## Documentation
 
@@ -42,7 +41,7 @@ check out [bisheng-rt Dev Docs](https://m7a7tqsztt.feishu.cn/wiki/CTXNwpqGKiMs5F
 Reporting problems, asking questions
 We appreciate any feedback, questions or bug reporting regarding this project. 
 
-User can posting [Issues](https://github.com/dataelement/bisheng/issues), 
+User can post [Issues](https://github.com/dataelement/bisheng/issues), 
 follow the process outlined in the [Stack Overflow document](https://stackoverflow.com/help/mcve). 
 
 For questions, we recommend posting in our community GitHub [Discussions](https://github.com/dataelement/bisheng/discussions).
diff --git a/resource/internal_model_repository/op_defs/ops.pbtxt b/resource/internal_model_repository/op_defs/ops.pbtxt
index be5b8aa..7431633 100644
--- a/resource/internal_model_repository/op_defs/ops.pbtxt
+++ b/resource/internal_model_repository/op_defs/ops.pbtxt
@@ -989,6 +989,23 @@ ops [
       { name: "OUTPUT", data_type: TYPE_STRING, dims: [ 1 ] }
     ]
 
+    instance_group [ { count: 1, kind: KIND_CPU } ]
+  },
+  {
+    name: "dataelem.pymodel.elem_model"
+    backend: "python"
+    max_batch_size: 0
+
+    parameters { key: "pymodel_type" value: { string_value: "" } }
+
+    input [
+      { name: "INPUT", data_type: TYPE_STRING, dims: [ 1 ] }
+    ]
+
+    output [
+      { name: "OUTPUT", data_type: TYPE_STRING, dims: [ 1 ] }
+    ]
+
     instance_group [ { count: 1, kind: KIND_CPU } ]
   }
 ]