diff --git a/lib/generator.js b/lib/generator.js
index 8ac211c..dac15a3 100644
--- a/lib/generator.js
+++ b/lib/generator.js
@@ -9,7 +9,7 @@ const DSL = require('@darabonba/parser');
 const {
   _name, _string, _subModelName, _vid,
   _isBinaryOp, _modelName, _isBuiltinModel,
-  REQUEST, RESPONSE, CORE, _upperFirst, _avoidKeywords, 
+  REQUEST, RESPONSE, CORE, _upperFirst, _avoidKeywords, _filedsAccess,
   ERROR, MODEL, STREAM, UNRETRY_ERROR, RETRY_CONTEXT, SSE_EVENT,
   RESP_ERROR, RETRY_OPTION, RUNTIME_OPTION, EXTEND_PARAM
 } = require('./helper');
@@ -1298,13 +1298,14 @@ ${this.config.clientName}::main(array_slice($argv, 1));`);
     let node;
     for (let i = 0; i < ast.nodes.length; i++) {
       node = ast.nodes[i];
+      const fieldName = _name(node.fieldName);
       //  TODO document gen
       this.emit('/**\n', level);
       this.emit('* @var ', level);
-      this.visitFieldType(node.fieldValue, level, _name(node.fieldName));
+      this.visitFieldType(node.fieldValue, level, fieldName);
       this.emit('\n');
       this.emit('*/\n', level);
-      this.emit(`protected $${_name(node.fieldName)};\n`, level);
+      this.emit(`${_filedsAccess(fieldName)} $${fieldName};\n`, level);
     }
 
     this.emit('\n');
diff --git a/lib/helper.js b/lib/helper.js
index 5289a25..11f5768 100644
--- a/lib/helper.js
+++ b/lib/helper.js
@@ -17,6 +17,12 @@ const keywords = [
   'try', 'unset', 'use', 'var', 'while', 'xor'
 ];
 
+const publicFields = [
+  // be compatible with TeaError
+  'message', 'errCode', 'data', 'name', 'statusCode',
+  'description', 'accessDeniedDetail', 'errorInfo',
+];
+
 const builtinModels = ['$Request', '$Response', '$Error', '$SSEEvent', '$Model'];
 const NAMESPACE = 'AlibabaCloud\\Dara';
 const CORE = 'AlibabaCloud\\Dara\\Dara';
@@ -61,6 +67,13 @@ function _avoidKeywords(str) {
   return str;
 }
 
+function _filedsAccess(str) {
+  if (publicFields.indexOf(str) > -1) {
+    return 'public';
+  }
+  return 'protected';
+}
+
 function _modelName(str) {
   if (keywords.indexOf(str.toLowerCase()) > -1 || str.toLowerCase() === 'model') {
     return str + '_';
@@ -98,7 +111,7 @@ function _isBuiltinModel(name){
 
 module.exports = {
   _name, _string, _subModelName, _vid, _upperFirst, _isBuiltinModel,
-  _isBinaryOp, _modelName, _avoidKeywords, RETRY_CONTEXT,
+  _isBinaryOp, _modelName, _avoidKeywords, _filedsAccess, RETRY_CONTEXT,
   REQUEST, RESPONSE, MODEL, NAMESPACE, ERROR, STREAM, UNRETRY_ERROR,
   CORE, SSE_EVENT, RESP_ERROR, RETRY_OPTION, RUNTIME_OPTION, EXTEND_PARAM
 };
\ No newline at end of file
diff --git a/package.json b/package.json
index 27efadf..01b5c27 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@darabonba/php-generator",
-  "version": "1.2.1",
+  "version": "2.0.0",
   "description": "The SDK generator for PHP",
   "main": "lib/generator",
   "directories": {
diff --git a/tests/expected/complex/Exceptions/Err1Exception.php b/tests/expected/complex/Exceptions/Err1Exception.php
index b865108..d9b89a6 100644
--- a/tests/expected/complex/Exceptions/Err1Exception.php
+++ b/tests/expected/complex/Exceptions/Err1Exception.php
@@ -8,7 +8,7 @@ class Err1Exception extends DaraException {
   /**
   * @var string[]
   */
-  protected $data;
+  public $data;
 
   public function __construct($map)
   {
diff --git a/tests/expected/model/Exceptions/MainFileException.php b/tests/expected/model/Exceptions/MainFileException.php
index 675ebc0..2a5c437 100644
--- a/tests/expected/model/Exceptions/MainFileException.php
+++ b/tests/expected/model/Exceptions/MainFileException.php
@@ -13,7 +13,7 @@ class MainFileException extends DaraException {
   /**
   * @var model_[]
   */
-  protected $data;
+  public $data;
   /**
   * @var \Dara\PHP\Tests\Models\MainFile\model_
   */