diff --git a/kernel/model/export.go b/kernel/model/export.go
index f5ae0f3bb..0c8335b7b 100644
--- a/kernel/model/export.go
+++ b/kernel/model/export.go
@@ -628,7 +628,9 @@ func prepareExportTree(bt *treenode.BlockTree) (ret *parse.Tree) {
 			first.InsertBefore(node)
 		}
 	}
+	ret.Path = bt.Path
 	ret.HPath = bt.HPath
+	ret.Box = bt.BoxID
 	return
 }
 
diff --git a/kernel/model/export_merge.go b/kernel/model/export_merge.go
index c8b1e503a..b19aea89f 100644
--- a/kernel/model/export_merge.go
+++ b/kernel/model/export_merge.go
@@ -25,7 +25,7 @@ import (
 
 func mergeSubDocs(rootTree *parse.Tree) (ret *parse.Tree, err error) {
 	ret = rootTree
-	rootBlock := &Block{Box: rootTree.Box, ID: rootTree.ID, Path: rootTree.Path}
+	rootBlock := &Block{Box: rootTree.Box, ID: rootTree.ID, Path: rootTree.Path, HPath: rootTree.HPath}
 	if err = buildBlockChildren(rootBlock); nil != err {
 		return
 	}