diff --git a/package.json b/package.json
index cde5c4d..6f83655 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mind-elixir",
-  "version": "4.3.2",
+  "version": "4.3.3",
   "type": "module",
   "description": "Mind elixir is a free open source mind map core.",
   "keywords": [
diff --git a/src/nodeOperation.ts b/src/nodeOperation.ts
index 93888a1..ecdde9d 100644
--- a/src/nodeOperation.ts
+++ b/src/nodeOperation.ts
@@ -5,6 +5,7 @@ import type { Topic } from './types/dom'
 import type { MindElixirInstance, NodeObj } from './types/index'
 import { insertNodeObj, insertParentNodeObj, moveUpObj, moveDownObj, removeNodeObj, moveNodeObj } from './utils/objectManipulation'
 import { addChildDom, removeNodeDom } from './utils/domManipulation'
+import { LEFT, RIGHT } from './const'
 
 const typeMap: Record<string, InsertPosition> = {
   before: 'beforebegin',
@@ -65,6 +66,10 @@ export const insertSibling = function (this: MindElixirInstance, type: 'before'
     return
   }
   const newNodeObj = node || this.generateNewObj()
+  if (!nodeObj.parent?.parent) {
+    const direction = nodeEle.offsetParent.offsetParent.parentElement.className === 'lhs' ? LEFT : RIGHT
+    newNodeObj.direction = direction
+  }
   insertNodeObj(newNodeObj, type, nodeObj)
   fillParent(this.nodeData)
   const t = nodeEle.parentElement
diff --git a/src/types/index.ts b/src/types/index.ts
index d0654a2..f6caa47 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -150,6 +150,9 @@ export type Options = {
 
 export type Uid = string
 
+export type Left = 0
+export type Right = 1
+
 /**
  * MindElixir node object
  *
@@ -169,7 +172,7 @@ export type NodeObj = {
   icons?: string[]
   hyperLink?: string
   expanded?: boolean
-  direction?: number
+  direction?: Left | Right
   image?: {
     url: string
     width: number