diff --git a/.github/workflows/cr.yml b/.github/workflows/cr.yml
index c346c6b..d6a9696 100644
--- a/.github/workflows/cr.yml
+++ b/.github/workflows/cr.yml
@@ -1,21 +1,28 @@
-name: Automated Ollama Code Review
+name: Code Review
+
+permissions:
+  contents: read
+  pull-requests: write
 
 on:
   pull_request:
-    branches:
-      - main
+    types: [opened, reopened, synchronize]
 
 jobs:
-  ollama_review:
+  test:
+    # if: ${{ contains(github.event.*.labels.*.name, 'gpt review') }} # Optional; to run only when a label is attached
     runs-on: ubuntu-latest
-    name: Ollama Code Review Job
     steps:
-      - name: Checkout Repository
-        uses: actions/checkout@v2
-
-      - name: Ollama Code Review
-        uses: ./.github/actions/ollama-code-review
-        with:
-          llm-model: 'codegemma'
+      - uses: anc95/ChatGPT-CodeReview@main
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+          # Optional
+          LANGUAGE: Chinese
+          OPENAI_API_ENDPOINT: https://api.openai.com/v1
+          MODEL: gpt-3.5-turbo # https://platform.openai.com/docs/models
+          PROMPT: # example: Please check if there are any confusions or irregularities in the following code diff:
+          top_p: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-top_p
+          temperature: 1 # https://platform.openai.com/docs/api-reference/chat/create#chat/create-temperature
+          max_tokens: 10000
+          MAX_PATCH_LENGTH: 10000 # if the patch/diff length is large than MAX_PATCH_LENGTH, will be ignored and won't review. By default, with no MAX_PATCH_LENGTH set, there is also no limit for the patch/diff length.
\ No newline at end of file
diff --git a/packages/core/README.md b/packages/core/README.md
index 68fe204..ffe25ce 100644
--- a/packages/core/README.md
+++ b/packages/core/README.md
@@ -70,6 +70,8 @@ message MyRequest {
 
 const ts = parseProto(source, {
   // Options
+  outputType,
+  mode,
 });
 ```
 
@@ -101,4 +103,5 @@ message MyRequest {
 `;
 
 const ts = parseProto(source);
+
 ```
diff --git a/packages/core/src/node/io.js b/packages/core/src/node/io.js
index 92570bf..2a06b3a 100644
--- a/packages/core/src/node/io.js
+++ b/packages/core/src/node/io.js
@@ -2,6 +2,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { handleError } from '../utils/log.js';
 import { parseProtoFiles } from '../core.js';
+import { defaultFilename } from '../constant.js';
 
 const { mkdirSync, readdirSync, writeFileSync } = fs;
 
@@ -28,6 +29,10 @@ export function transformProtoFiles(options) {
   if (!res) return;
 
   mkdirSync(outputDir, { recursive: true });
+  
+  if(res.has(defaultFilename)) {
+    res.delete(defaultFilename);
+  }
 
   res.forEach((value, key) => {
     const outputFile = path.join(outputDir, key);
diff --git a/packages/core/src/print/gen-enum.js b/packages/core/src/print/gen-enum.js
index 0284600..9f9f91b 100644
--- a/packages/core/src/print/gen-enum.js
+++ b/packages/core/src/print/gen-enum.js
@@ -1,5 +1,8 @@
 import MagicString from 'magic-string';
 import { indentPrefix, OUTPUT_TYPE } from '../constant.js';
+import protobuf from 'protobufjs';
+
+const { Type } = protobuf;
 
 /**
  * generate typescript files from proto info
@@ -8,7 +11,7 @@ import { indentPrefix, OUTPUT_TYPE } from '../constant.js';
  * @returns
  */
 export function genEnum(proto, options) {
-  const { values, comments, name } = proto;
+  const { values, comments, name, parent } = proto;
 
   const items = Object.keys(values)
     .map((key) => ({
@@ -21,7 +24,7 @@ export function genEnum(proto, options) {
   const result = new MagicString('');
 
   items.forEach((s) => {
-    if(s.comment) {
+    if (s.comment) {
       result.append(`//${s.comment}\n`);
     }
     result.append(`${s.name} = ${s.id},\n`);
@@ -29,9 +32,16 @@ export function genEnum(proto, options) {
 
   const prefix = options.outputType === OUTPUT_TYPE.definition ? '' : 'export ';
 
+  let interfaceName = name;
+
+  // deal with nested type conflict problem
+  if (parent && parent instanceof Type && parent.name) {
+    interfaceName = parent.name + interfaceName;
+  }
+
   result
     .indent(indentPrefix)
-    .prepend(`${prefix}enum ${name} {\n`)
+    .prepend(`${prefix}enum ${interfaceName} {\n`)
     .append('}\n\n');
 
   return {
@@ -60,7 +70,7 @@ export function getJsdocEnum(proto, options) {
   const result = new MagicString('');
 
   items.forEach((s) => {
-    if(s.comment) {
+    if (s.comment) {
       result.append(`//${s.comment}\n`);
     }
     result.append(`${s.name} = ${s.id},\n`);
diff --git a/packages/core/src/print/gen-service.js b/packages/core/src/print/gen-service.js
index 9b76561..3e400d6 100644
--- a/packages/core/src/print/gen-service.js
+++ b/packages/core/src/print/gen-service.js
@@ -52,7 +52,9 @@ export function genService(proto, options) {
     const prefix = options.outputType === OUTPUT_TYPE.definition ? '' : 'export ';
 
     if (item.comment) {
-      result.append(`//${item.comment}\n`);
+      item.comment.split('\n').forEach((line) => {
+        result.append(`//${line} \n`);
+      })
     }
 
     result.append(
diff --git a/packages/core/tests/comment/index.spec.js b/packages/core/tests/comment/index.spec.js
index af97f4a..f2f4541 100644
--- a/packages/core/tests/comment/index.spec.js
+++ b/packages/core/tests/comment/index.spec.js
@@ -4,7 +4,7 @@ import { test } from 'uvu';
 import * as assert from 'uvu/assert';
 
 
-const source = `
+const sample1 = `
 
 message UpdateHostBankAccWalletInfoResp {
   // 0:成功  非0:错误码   
@@ -19,12 +19,43 @@ message UpdateHostBankAccWalletInfoResp {
 `;
 
 test('Comment of Field type should be converted', () => {
-  const ts = parseProto(source);
+  const ts = parseProto(sample1);
 
   assert.match(ts, '//50010 bank account already exist');
   assert.match(ts, '//50011: bank account number already exist');
   assert.match(ts, '//50012 bank account mismatch the one on');
 });
 
+const sample2 = `
+  syntax = "proto3";
+
+  service Greeter {
+      //hello
+      //hello1
+      rpc SayHello (HelloRequest) returns (HelloReply) {}
+  }
+  
+  message HelloRequest {
+    string name = 1;
+  }
+  
+  message Teacher {
+    string name = 1;
+  }
+  
+  message HelloReply {
+      string message = 1;
+      int32 test = 2;
+      Teacher teacher = 3;
+  }
+`;
+
+test('Comment of function type should be converted', () => {
+  const ts = parseProto(sample2);
+
+  assert.match(ts, '//hello');
+  assert.match(ts, '//hello1');
+});
+
 
 test.run();
\ No newline at end of file
diff --git a/packages/core/tests/print/nest.spec.js b/packages/core/tests/print/nest.spec.js
index 06ff7ce..78fbcc3 100644
--- a/packages/core/tests/print/nest.spec.js
+++ b/packages/core/tests/print/nest.spec.js
@@ -140,5 +140,27 @@ test('nest type6 should be converted', () => {
   assert.match(ts, '@typedef {Object} Message1');
 });
 
+
+test('nest type7 should be converted', () => {
+  const source = `
+    syntax = "proto3";
+    message UpdateUserRoleReq {
+      enum Type {
+        PLATFORM = 0;
+        PROJECT = 1;
+        MODULE = 2;
+        PLUGIN = 3;
+      }
+      int32 user_id = 1;
+      int32 role_id = 2;
+      Type type = 3;
+    }
+ `;
+
+ const ts = parseProto(source);
+ assert.match(ts, 'type?: UpdateUserRoleReqType;');
+ assert.match(ts, 'enum UpdateUserRoleReqType');
+}) 
+
 test.run();