diff --git a/db/db_manager.go b/db/db_manager.go
index 7c309fa..7fffe32 100644
--- a/db/db_manager.go
+++ b/db/db_manager.go
@@ -24,7 +24,7 @@ func CopyData() {
 		panic("dbList is nil")
 	}
 
-	timeNow := time.Now().Add(-7 * 24 * time.Hour)
+	timeNow := time.Now().Add(-4 * 24 * time.Hour)
 	format := timeNow.Format("2006-01-02")
 	parse, _ := time.Parse("2006-01-02", format)