Perhaps the director also felt it was a little dull. With no news at all, how many people would care about the movie? So he drew on the experience of "Lust Caution" and added some passion between Zhao Wei and Chen Kun. Where is the most touching place for passion? If it's still in bed, it will damage the image of Mulan, the audience probably wouldn't agree. Thinking it over and over, this scene had to be filmed in the water.