1. In the AnimationBlueprint animation blueprint, the "record" button in the lower right corner of the view, the default recording time is 60 seconds.
In Animation Editor -> Window -> Recording Settings.
Change recording settings
2. Play particle effects at a certain frame of the animation
2.1 Set the first way to play particles in animation, add notifications.
2.1.1 In the animation timeline view, right-click the line of the notification, "Add notification" -> "Play Niagara particle effect" or "Play particle effect"
2.2 Click on the new notification -> set Niagara particles in the right panel
2.3 Set the slot bound when generating particles
2.2 Set the second way to play particles in animation, add notification status (you can set the time to play particles)
2.2.1 Click on the added notification state -> select a particle effect , name the slot.
You can drag the notification state to change the playback time.
