diff --git a/constants/event.go b/constants/event.go
index e4ea62e..11dbf29 100644
--- a/constants/event.go
+++ b/constants/event.go
@@ -52,15 +52,13 @@ const (
 const (
 	// EventStatusHappended define status for event record when event just happened, no data attached yet
 	EventStatusHappended = iota
-	// EventStatusDataAttached define status for event record when event just happened, data attached already
+	// EventStatusDataAttached define status for event record when event data attached, ready to be sent
 	EventStatusDataAttached
-	// EventStatusReported define status for event record when event reported to CIM, no matter it's successful or failed
+	// EventStatusReported define status for event record when event reported to downstream, no matter it's successful or failed
 	EventStatusReported
-	// EventStatusConfirmed define status for event record when event confirmed by CIM, no matter it's successful or failed
+	// EventStatusConfirmed define status for event record when event confirmed by operator or CIM
 	EventStatusConfirmed
-	// EventStatusPersisted define status for event record when event persisted in database, no matter it's successful or failed
-	EventStatusPersisted
-	// EventStatusClosed define status for event record when event closed, no matter it's successful or failed
+	// EventStatusClosed define status for event record when event closed due to condition recovery or manual close
 	EventStatusClosed
 )
 
diff --git a/mq/event/event.go b/mq/event/event.go
index 6740251..951242e 100644
--- a/mq/event/event.go
+++ b/mq/event/event.go
@@ -13,6 +13,8 @@ type EventRecord struct {
 	Priority int `json:"priority"`
 	// 事件状态
 	Status int `json:"status"`
+	// 是否已持久化到数据库，由 eventRT 消费并落库后置为 true
+	IsPersisted bool `json:"is_persisted"`
 	// 可选模板参数
 	Category string `json:"category,omitempty"`
 	// 毫秒级时间戳 (Unix epoch)