diff --git a/structs/alias.go b/structs/alias.go
index 528805611..a25e1bf09 100644
--- a/structs/alias.go
+++ b/structs/alias.go
@@ -27,7 +27,6 @@ func (as *Aliases) AddAlias(real, alias string) {
 	if rn, ok := as.mapping[alias]; ok {
 		panic(fmt.Sprintf("The alias '%s' is already used by '%s'", alias, rn))
 	}
-
 	as.mapping[alias] = real
 }
 
diff --git a/structs/alias_test.go b/structs/alias_test.go
index 015655d01..a007e1c36 100644
--- a/structs/alias_test.go
+++ b/structs/alias_test.go
@@ -25,6 +25,8 @@ func TestAliases_AddAliases(t *testing.T) {
 	assert.Eq(t, "real1", as.ResolveAlias("a1"))
 	assert.Eq(t, "notExist", as.ResolveAlias("notExist"))
 
+	assert.NotEmpty(t, as.Mapping())
+
 	assert.PanicsMsg(t, func() {
 		as.AddAlias("real3", "a")
 	}, "The alias 'a' is already used by 'real'")
diff --git a/structs/data.go b/structs/data.go
index ae0081898..9dbe09845 100644
--- a/structs/data.go
+++ b/structs/data.go
@@ -10,76 +10,47 @@ import (
 )
 
 // LiteData simple map[string]any struct. no lock
-type LiteData struct {
-	data map[string]any
-}
-
-// Data get all
-func (d *LiteData) Data() map[string]any {
-	return d.data
-}
-
-// SetData set all data
-func (d *LiteData) SetData(data map[string]any) {
-	d.data = data
-}
-
-// Value get from data
-func (d *LiteData) Value(key string) any {
-	return d.data[key]
-}
-
-// GetVal get from data
-func (d *LiteData) GetVal(key string) any {
-	return d.data[key]
-}
+type LiteData = Data
 
-// StrValue get from data
-func (d *LiteData) StrValue(key string) string {
-	return strutil.QuietString(d.data[key])
-}
-
-// IntVal get from data
-func (d *LiteData) IntVal(key string) int {
-	return mathutil.QuietInt(d.data[key])
-}
-
-// SetValue to data
-func (d *LiteData) SetValue(key string, val any) {
-	if d.data == nil {
-		d.data = make(map[string]any)
+// NewLiteData create, not lock
+func NewLiteData(data map[string]any) *Data {
+	if data == nil {
+		data = make(map[string]any)
 	}
-	d.data[key] = val
-}
 
-// ResetData all data
-func (d *LiteData) ResetData() {
-	d.data = nil
+	return &LiteData{
+		data: data,
+	}
 }
 
 /*************************************************************
  * data struct and allow enable lock
  *************************************************************/
 
-// Data struct, allow enable lock TODO
+// Data struct, allow enable lock
 type Data struct {
 	sync.RWMutex
-	enableLock bool
-	// data store
+	lock bool
 	data map[string]any
 }
 
-// NewData create
+// NewData create new data instance
 func NewData() *Data {
 	return &Data{
+		lock: true,
 		data: make(map[string]any),
 	}
 }
 
+// WithLock for operate data
+func (d *Data) WithLock() *Data {
+	d.lock = true
+	return d
+}
+
 // EnableLock for operate data
 func (d *Data) EnableLock() *Data {
-	d.enableLock = true
-	return d
+	return d.WithLock()
 }
 
 // Data get all
@@ -89,7 +60,7 @@ func (d *Data) Data() map[string]any {
 
 // SetData set all data
 func (d *Data) SetData(data map[string]any) {
-	if !d.enableLock {
+	if !d.lock {
 		d.data = data
 		return
 	}
@@ -109,6 +80,11 @@ func (d *Data) ResetData() {
 	d.data = make(map[string]any)
 }
 
+// Merge load new data
+func (d *Data) Merge(mp map[string]any) {
+	d.data = maputil.SimpleMerge(d.data, mp)
+}
+
 // Set value to data
 func (d *Data) Set(key string, val any) {
 	d.SetValue(key, val)
@@ -116,7 +92,7 @@ func (d *Data) Set(key string, val any) {
 
 // SetValue to data
 func (d *Data) SetValue(key string, val any) {
-	if d.enableLock {
+	if d.lock {
 		d.Lock()
 		defer d.Unlock()
 	}
@@ -126,12 +102,12 @@ func (d *Data) SetValue(key string, val any) {
 
 // Value get from data
 func (d *Data) Value(key string) (val any, ok bool) {
-	if d.enableLock {
+	if d.lock {
 		d.RLock()
 		defer d.RUnlock()
 	}
 
-	val, ok = d.data[key]
+	val, ok = maputil.GetByPath(key, d.data)
 	return
 }
 
@@ -142,12 +118,13 @@ func (d *Data) Get(key string) any {
 
 // GetVal get from data
 func (d *Data) GetVal(key string) any {
-	if d.enableLock {
+	if d.lock {
 		d.RLock()
 		defer d.RUnlock()
 	}
 
-	return d.data[key]
+	val, _ := maputil.GetByPath(key, d.data)
+	return val
 }
 
 // StrVal get from data
diff --git a/structs/data_test.go b/structs/data_test.go
index 9236b630a..540ff7565 100644
--- a/structs/data_test.go
+++ b/structs/data_test.go
@@ -7,16 +7,41 @@ import (
 	"github.com/gookit/goutil/testutil/assert"
 )
 
+func TestLiteData_Data(t *testing.T) {
+	d := structs.NewLiteData(nil)
+	d.SetData(map[string]any{
+		"key0": 234,
+		"key1": "abc",
+		"key2": true,
+	})
+
+	assert.NotEmpty(t, d.Data())
+	v, ok := d.Value("key0")
+	assert.True(t, ok)
+	assert.Eq(t, 234, v)
+
+	d.ResetData()
+	assert.Empty(t, d.Data())
+}
+
 func TestNewData(t *testing.T) {
 	md := structs.NewData()
 	assert.Eq(t, 0, md.DataLen())
 
 	md.SetData(map[string]any{
 		"key0": 234,
+		"sub": map[string]any{
+			"skey1": "abc",
+			"skey2": true,
+		},
 	})
 	assert.NotEmpty(t, md.Data())
 	assert.Eq(t, 234, md.IntVal("key0"))
 
+	v, ok := md.Value("key0")
+	assert.True(t, ok)
+	assert.Eq(t, 234, v)
+
 	md.SetValue("key1", "val1")
 	assert.Eq(t, "val1", md.GetVal("key1"))
 	assert.Eq(t, "val1", md.StrVal("key1"))