diff --git a/pkg/channels/feishu/feishu_64.go b/pkg/channels/feishu/feishu_64.go
index 5be698cb5..1b7ce6840 100644
--- a/pkg/channels/feishu/feishu_64.go
+++ b/pkg/channels/feishu/feishu_64.go
@@ -6,11 +6,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	lark "github.com/larksuite/oapi-sdk-go/v3"
-	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
-	larkdispatcher "github.com/larksuite/oapi-sdk-go/v3/event/dispatcher"
-	larkim "github.com/larksuite/oapi-sdk-go/v3/service/im/v1"
-	larkws "github.com/larksuite/oapi-sdk-go/v3/ws"
 	"io"
 	"math/rand"
 	"net/http"
@@ -21,6 +16,12 @@ import (
 	"sync/atomic"
 	"time"
 
+	lark "github.com/larksuite/oapi-sdk-go/v3"
+	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
+	larkdispatcher "github.com/larksuite/oapi-sdk-go/v3/event/dispatcher"
+	larkim "github.com/larksuite/oapi-sdk-go/v3/service/im/v1"
+	larkws "github.com/larksuite/oapi-sdk-go/v3/ws"
+
 	"github.com/sipeed/picoclaw/pkg/bus"
 	"github.com/sipeed/picoclaw/pkg/channels"
 	"github.com/sipeed/picoclaw/pkg/config"
diff --git a/pkg/channels/feishu/feishu_64_test.go b/pkg/channels/feishu/feishu_64_test.go
index 77c6846ce..9010abf69 100644
--- a/pkg/channels/feishu/feishu_64_test.go
+++ b/pkg/channels/feishu/feishu_64_test.go
@@ -279,27 +279,3 @@ func TestExtractFeishuSenderID(t *testing.T) {
 		})
 	}
 }
-
-func TestReplyTargetMessageID(t *testing.T) {
-	strPtr := func(s string) *string { return &s }
-
-	t.Run("prefer parent_id", func(t *testing.T) {
-		msg := &larkim.EventMessage{ParentId: strPtr("om_parent"), RootId: strPtr("om_root")}
-		if got := replyTargetID(msg); got != "om_parent" {
-			t.Fatalf("replyTargetID() = %q, want %q", got, "om_parent")
-		}
-	})
-
-	t.Run("fallback to root_id", func(t *testing.T) {
-		msg := &larkim.EventMessage{RootId: strPtr("om_root")}
-		if got := replyTargetID(msg); got != "om_root" {
-			t.Fatalf("replyTargetID() = %q, want %q", got, "om_root")
-		}
-	})
-
-	t.Run("empty when no fields", func(t *testing.T) {
-		if got := replyTargetID(&larkim.EventMessage{}); got != "" {
-			t.Fatalf("replyTargetID() = %q, want empty", got)
-		}
-	})
-}