diff --git a/kernel/api/block.go b/kernel/api/block.go
index 8c01f06f9..ccfcc5644 100644
--- a/kernel/api/block.go
+++ b/kernel/api/block.go
@@ -27,7 +27,6 @@ import (
 	"github.com/siyuan-note/filelock"
 	"github.com/siyuan-note/logging"
 	"github.com/siyuan-note/siyuan/kernel/model"
-	"github.com/siyuan-note/siyuan/kernel/sql"
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
 
@@ -155,7 +154,19 @@ func checkBlockFold(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	ret.Data = sql.IsBlockFolded(id)
+	b, err := model.GetBlock(id, nil)
+	if errors.Is(err, filelock.ErrUnableAccessFile) {
+		ret.Code = 2
+		ret.Data = id
+		return
+	}
+	if errors.Is(err, model.ErrIndexing) {
+		ret.Code = 0
+		ret.Data = false
+		return
+	}
+
+	ret.Data = nil != b && "1" == b.IAL["fold"]
 }
 
 func checkBlockExist(c *gin.Context) {
@@ -168,7 +179,7 @@ func checkBlockExist(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	b, err := model.GetBlock(id)
+	b, err := model.GetBlock(id, nil)
 	if errors.Is(err, filelock.ErrUnableAccessFile) {
 		ret.Code = 2
 		ret.Data = id
@@ -376,7 +387,8 @@ func getBlockInfo(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	block, err := model.GetBlock(id)
+
+	tree, err := model.LoadTreeByID(id)
 	if errors.Is(err, filelock.ErrUnableAccessFile) {
 		ret.Code = 2
 		ret.Data = id
@@ -387,6 +399,8 @@ func getBlockInfo(c *gin.Context) {
 		ret.Msg = model.Conf.Language(56)
 		return
 	}
+
+	block, _ := model.GetBlock(id, tree)
 	if nil == block {
 		ret.Code = -1
 		ret.Msg = fmt.Sprintf(model.Conf.Language(15), id)
@@ -401,13 +415,13 @@ func getBlockInfo(c *gin.Context) {
 			rootChildID = b.ID
 			break
 		}
-		if b, _ = model.GetBlock(parentID); nil == b {
+		if b, _ = model.GetBlock(parentID, tree); nil == b {
 			logging.LogErrorf("not found parent")
 			break
 		}
 	}
 
-	root, err := model.GetBlock(block.RootID)
+	root, err := model.GetBlock(block.RootID, tree)
 	if errors.Is(err, filelock.ErrUnableAccessFile) {
 		ret.Code = 2
 		ret.Data = id
diff --git a/kernel/api/block_op.go b/kernel/api/block_op.go
index 7a5b4fd69..dac26ec3b 100644
--- a/kernel/api/block_op.go
+++ b/kernel/api/block_op.go
@@ -190,7 +190,7 @@ func updateBlock(c *gin.Context) {
 		return
 	}
 
-	block, err := model.GetBlock(id)
+	block, err := model.GetBlock(id, nil)
 	if nil != err {
 		ret.Code = -1
 		ret.Msg = "get block failed: " + err.Error()
diff --git a/kernel/api/filetree.go b/kernel/api/filetree.go
index c3b9b19c6..506730262 100644
--- a/kernel/api/filetree.go
+++ b/kernel/api/filetree.go
@@ -327,7 +327,7 @@ func duplicateDoc(c *gin.Context) {
 	}
 
 	id := arg["id"].(string)
-	newTree, err := model.DuplicateDoc(id)
+	tree, err := model.LoadTreeByID(id)
 	if nil != err {
 		ret.Code = -1
 		ret.Msg = err.Error()
@@ -335,24 +335,17 @@ func duplicateDoc(c *gin.Context) {
 		return
 	}
 
-	block, _ := model.GetBlock(id)
-	p := block.Path
-	notebook := block.Box
+	p := tree.Path
+	notebook := tree.Box
 	box := model.Conf.Box(notebook)
-	tree, err := model.LoadTree(box.ID, p)
-	if nil != err {
-		ret.Code = -1
-		ret.Msg = err.Error()
-		return
-	}
-
+	model.DuplicateDoc(tree)
 	pushCreate(box, p, tree.Root.ID, arg)
 
 	ret.Data = map[string]interface{}{
-		"id":       newTree.Root.ID,
+		"id":       tree.Root.ID,
 		"notebook": notebook,
-		"path":     newTree.Path,
-		"hPath":    newTree.HPath,
+		"path":     tree.Path,
+		"hPath":    tree.HPath,
 	}
 }
 
@@ -478,7 +471,7 @@ func createDocWithMd(c *gin.Context) {
 	ret.Data = id
 
 	box := model.Conf.Box(notebook)
-	b, _ := model.GetBlock(id)
+	b, _ := model.GetBlock(id, nil)
 	p := b.Path
 	pushCreate(box, p, id, arg)
 }
diff --git a/kernel/model/block.go b/kernel/model/block.go
index 1cc22caba..40d85a4de 100644
--- a/kernel/model/block.go
+++ b/kernel/model/block.go
@@ -25,7 +25,6 @@ import (
 	"github.com/88250/lute/ast"
 	"github.com/88250/lute/parse"
 	"github.com/siyuan-note/siyuan/kernel/sql"
-	"github.com/siyuan-note/siyuan/kernel/task"
 	"github.com/siyuan-note/siyuan/kernel/treenode"
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
@@ -383,31 +382,33 @@ func GetBlockKramdown(id string) (ret string) {
 	return
 }
 
-func GetBlock(id string) (ret *Block, err error) {
-	ret, err = getBlock(id)
+func GetBlock(id string, tree *parse.Tree) (ret *Block, err error) {
+	ret, err = getBlock(id, tree)
 	return
 }
 
-func getBlock(id string) (ret *Block, err error) {
+func getBlock(id string, tree *parse.Tree) (ret *Block, err error) {
 	if "" == id {
 		return
 	}
 
-	tree, err := loadTreeByBlockID(id)
-	if nil != err {
-		if task.ContainIndexTask() {
-			err = ErrIndexing
-			return
-		}
-
-		time.Sleep(1 * time.Second)
+	if nil == tree {
 		tree, err = loadTreeByBlockID(id)
 		if nil != err {
-			return
+			time.Sleep(1 * time.Second)
+			tree, err = loadTreeByBlockID(id)
+			if nil != err {
+				return
+			}
 		}
 	}
 
 	node := treenode.GetNodeInTree(tree, id)
+	if nil == node {
+		err = ErrBlockNotFound
+		return
+	}
+
 	sqlBlock := sql.BuildBlockFromNode(node, tree)
 	if nil == sqlBlock {
 		return
diff --git a/kernel/model/file.go b/kernel/model/file.go
index 613600cc0..d3db4fd53 100644
--- a/kernel/model/file.go
+++ b/kernel/model/file.go
@@ -892,18 +892,12 @@ func renameWriteJSONQueue(tree *parse.Tree, oldHPath string) (err error) {
 	return
 }
 
-func DuplicateDoc(rootID string) (ret *parse.Tree, err error) {
+func DuplicateDoc(tree *parse.Tree) {
 	msgId := util.PushMsg(Conf.Language(116), 30000)
 	defer util.PushClearMsg(msgId)
 
-	WaitForWritingFiles()
-	ret, err = loadTreeByBlockID(rootID)
-	if nil != err {
-		return
-	}
-
-	resetTree(ret, "Duplicated")
-	createTreeTx(ret)
+	resetTree(tree, "Duplicated")
+	createTreeTx(tree)
 	WaitForWritingFiles()
 	return
 }
diff --git a/kernel/model/tree.go b/kernel/model/tree.go
index 18fbe81bc..1bcd94727 100644
--- a/kernel/model/tree.go
+++ b/kernel/model/tree.go
@@ -30,6 +30,7 @@ import (
 	"github.com/siyuan-note/filelock"
 	"github.com/siyuan-note/logging"
 	"github.com/siyuan-note/siyuan/kernel/filesys"
+	"github.com/siyuan-note/siyuan/kernel/task"
 	"github.com/siyuan-note/siyuan/kernel/treenode"
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
@@ -145,6 +146,10 @@ var (
 	ErrIndexing      = errors.New("indexing")
 )
 
+func LoadTreeByID(id string) (ret *parse.Tree, err error) {
+	return loadTreeByBlockID(id)
+}
+
 func loadTreeByBlockID(id string) (ret *parse.Tree, err error) {
 	if "" == id {
 		return nil, ErrTreeNotFound
@@ -152,6 +157,11 @@ func loadTreeByBlockID(id string) (ret *parse.Tree, err error) {
 
 	bt := treenode.GetBlockTree(id)
 	if nil == bt {
+		if task.ContainIndexTask() {
+			err = ErrIndexing
+			return
+		}
+
 		return nil, ErrBlockNotFound
 	}
 	ret, err = LoadTree(bt.BoxID, bt.Path)
diff --git a/kernel/sql/block_query.go b/kernel/sql/block_query.go
index c8dd627f2..0b450083c 100644
--- a/kernel/sql/block_query.go
+++ b/kernel/sql/block_query.go
@@ -95,25 +95,6 @@ func (block *Block) IsContainerBlock() bool {
 	return false
 }
 
-func IsBlockFolded(id string) (ret bool) {
-	sqlStmt := "SELECT parent_id, ial FROM blocks WHERE id = ? AND type != 'd'"
-	for i := 0; i < 64; i++ {
-		row := queryRow(sqlStmt, id)
-		var pid, ial string
-		if err := row.Scan(&pid, &ial); nil != err {
-			if sql.ErrNoRows != err {
-				logging.LogErrorf("query scan field failed: %s", err)
-			}
-			return
-		}
-		id = pid
-		if strings.Contains(ial, "fold=\"1\"") {
-			return true
-		}
-	}
-	return
-}
-
 func queryBlockChildrenIDs(id string) (ret []string) {
 	ret = append(ret, id)
 	childIDs := queryBlockIDByParentID(id)