Kitty happened to come out of the monastery and was chased and beaten. The Chinese soldiers protecting her were overwhelmed, and Walter came to protect her, but was too weak.
At this time, the Chinese soldiers came and fired a shot in the air. The Chinese teenagers who were chasing and beating Kitty were stunned, not knowing how to deal with this man who rebelled against his own.
So Kitty Walter took the opportunity to escape.
I read the book today, but there is no such description in the book. It must be a plot added by the movie to highlight the sublimation of the two people's feelings.
But thinking about this episode, at this point in time, I really don't know how to feel.
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