As a non-fiction image, the most impressive part of the documentary is its objective authenticity. The participation of the creator not only does not destroy this reality, but deepens it. This is not a "fly on the wall" method, because when the director participates in this event, he has inevitably influenced the process of the event. From the description at the beginning, the audience knows the circumstances under which the shooting team shot these materials, and also knows how the director dealt with such emergencies at the moment of the event. The addition of these details makes the emotion revealed in the film more real and moving.