diff --git a/lexical.go b/lexical.go
index aa77818..314d9c6 100644
--- a/lexical.go
+++ b/lexical.go
@@ -41,13 +41,13 @@ type lexical struct {
 // Author : go_developer@163.com<白茶清欢>
 //
 // Date : 18:11 2022/7/4
-func (l *lexical) Parse(jsonData string) ([]*lexicalNode, error) {
+func (l *lexical) Parse() error {
 	// mt.Println(jsonData)
-	if len(jsonData) < 2 {
-		return nil, errors.New("input data is not json")
+	if len(l.jsonData) < 2 {
+		return errors.New("input data is not json")
 	}
 	tmpStr := ""
-	for _, itemChar := range jsonData {
+	for _, itemChar := range l.jsonData {
 		currentChar := string(itemChar)
 		tmpRealVal, tmpStrType := l.getTmpStrType(tmpStr)
 		if l.inputCharIsToken(currentChar, tmpStr, tmpStrType) {
@@ -83,7 +83,7 @@ func (l *lexical) Parse(jsonData string) ([]*lexicalNode, error) {
 		}
 	}
 
-	return l.lexicalResult, nil
+	return nil
 }
 
 // inputCharIsToken 输入字符是否为关键字
@@ -272,3 +272,16 @@ func (l *lexical) getTmpStrType(tmpStr string) (interface{}, string) {
 	}
 	return tmpStr, "string"
 }
+
+// String 将解析后的词法, 转换为字符串
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:34 2022/7/5
+func (l *lexical) String() string {
+	str := ""
+	for _, item := range l.lexicalResult {
+		str = str + item.ValStr()
+	}
+	return str
+}
diff --git a/lexical_test.go b/lexical_test.go
index 98a6dd2..e475662 100644
--- a/lexical_test.go
+++ b/lexical_test.go
@@ -34,9 +34,7 @@ func Test_parseLexical(t *testing.T) {
 }`
 	//jsonData = `{"name":"zhangsan","age":"18","extension":{"sex":"man","height":"180"},"teacher_list":[{"name":"t1","age":"11"},{"name":"t2","age":"12"}]}`
 
-	r, _ := NewLexical(jsonData).Parse(jsonData)
-	for _, val := range r {
-		fmt.Print(val.Val)
-	}
-	fmt.Print("\n")
+	instance := NewLexical(jsonData)
+	_ = instance.Parse()
+	fmt.Println(instance.String())
 }
diff --git a/syntax.go b/syntax.go
index c98c5bf..66b4d72 100644
--- a/syntax.go
+++ b/syntax.go
@@ -6,3 +6,15 @@
 //
 // Date : 2022-07-04 17:53
 package filter
+
+// NewSyntax 构建JSON语法树
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 14:33 2022/7/5
+func NewSyntax(lexical []*lexicalNode) *syntax {
+	return &syntax{}
+}
+
+type syntax struct {
+}