diff --git a/kernel/api/block.go b/kernel/api/block.go
index 55d3132a1..826b92f01 100644
--- a/kernel/api/block.go
+++ b/kernel/api/block.go
@@ -189,6 +189,20 @@ func getHeadingChildrenIDs(c *gin.Context) {
 	ret.Data = ids
 }
 
+func appendHeadingChildren(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	arg, ok := util.JsonArg(c, ret)
+	if !ok {
+		return
+	}
+
+	id := arg["id"].(string)
+	dom := arg["dom"].(string)
+	model.AppendHeadingChildren(id, dom)
+}
+
 func getHeadingChildrenDOM(c *gin.Context) {
 	ret := gulu.Ret.NewResult()
 	defer c.JSON(http.StatusOK, ret)
@@ -199,7 +213,11 @@ func getHeadingChildrenDOM(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	dom := model.GetHeadingChildrenDOM(id)
+	removeFoldAttr := false
+	if nil != arg["removeFoldAttr"] {
+		removeFoldAttr = arg["removeFoldAttr"].(bool)
+	}
+	dom := model.GetHeadingChildrenDOM(id, removeFoldAttr)
 	ret.Data = dom
 }
 
diff --git a/kernel/api/router.go b/kernel/api/router.go
index e6cbf22f8..8e1f8e0f5 100644
--- a/kernel/api/router.go
+++ b/kernel/api/router.go
@@ -222,6 +222,7 @@ func ServeAPI(ginServer *gin.Engine) {
 	ginServer.Handle("POST", "/api/block/getBlockRelevantIDs", model.CheckAuth, getBlockRelevantIDs)
 	ginServer.Handle("POST", "/api/block/getBlockTreeInfos", model.CheckAuth, getBlockTreeInfos)
 	ginServer.Handle("POST", "/api/block/checkBlockRef", model.CheckAuth, checkBlockRef)
+	ginServer.Handle("POST", "/api/block/appendHeadingChildren", model.CheckAuth, appendHeadingChildren)
 
 	ginServer.Handle("POST", "/api/file/getFile", model.CheckAuth, getFile)
 	ginServer.Handle("POST", "/api/file/putFile", model.CheckAuth, model.CheckAdminRole, model.CheckReadonly, putFile)
diff --git a/kernel/model/block.go b/kernel/model/block.go
index d84780af0..34c1eb694 100644
--- a/kernel/model/block.go
+++ b/kernel/model/block.go
@@ -20,6 +20,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"slices"
 	"strings"
 	"time"
 
@@ -629,7 +630,35 @@ func GetHeadingChildrenIDs(id string) (ret []string) {
 	return
 }
 
-func GetHeadingChildrenDOM(id string) (ret string) {
+func AppendHeadingChildren(id, childrenDOM string) {
+	tree, err := LoadTreeByBlockID(id)
+	if err != nil {
+		return
+	}
+
+	heading := treenode.GetNodeInTree(tree, id)
+	if nil == heading || ast.NodeHeading != heading.Type {
+		return
+	}
+
+	luteEngine := util.NewLute()
+	subTree := luteEngine.BlockDOM2Tree(childrenDOM)
+	var nodes []*ast.Node
+	for n := subTree.Root.FirstChild; nil != n; n = n.Next {
+		nodes = append(nodes, n)
+	}
+
+	slices.Reverse(nodes)
+	for _, n := range nodes {
+		heading.InsertAfter(n)
+	}
+
+	if err = indexWriteTreeUpsertQueue(tree); err != nil {
+		return
+	}
+}
+
+func GetHeadingChildrenDOM(id string, removeFoldAttr bool) (ret string) {
 	tree, err := LoadTreeByBlockID(id)
 	if err != nil {
 		return
@@ -650,13 +679,18 @@ func GetHeadingChildrenDOM(id string) (ret string) {
 				return ast.WalkContinue
 			}
 
-			n.RemoveIALAttr("heading-fold")
-			n.RemoveIALAttr("fold")
+			if removeFoldAttr {
+				n.RemoveIALAttr("heading-fold")
+				n.RemoveIALAttr("fold")
+			}
 			return ast.WalkContinue
 		})
 	}
-	heading.RemoveIALAttr("fold")
-	heading.RemoveIALAttr("heading-fold")
+
+	if removeFoldAttr {
+		heading.RemoveIALAttr("fold")
+		heading.RemoveIALAttr("heading-fold")
+	}
 
 	luteEngine := util.NewLute()
 	ret = renderBlockDOMByNodes(nodes, luteEngine)