In the story "The Flying Machine" by R. Bradbury, what danger does the flyer's invention pose and why does the Emperor feel this way?

In "The Flying Machine," published by Ray Bradbury in
1953, the literal danger the Emperor perceives in the creation of the flying machine is
that this innovation will cause people to move away from the beauty brought about by the
creation, and cause some to find a way to use the invention for evil purposes,
specifically flying over the Great Wall of China. In order to be assured that this does
not happen, the Emperor kills the inventor, burns the invention, and "silences" all
those who have witnessed the man flying in the
sky.

However, figuratively, the danger the Emperor
anticipates is change and advancement. The peace he enjoys comes from living an
existence rooted in the present, in the moment. With inventions come change, and the
Emperor fears change. It is not until the end that he realizes that his actions will not
guarantee that progress will cease. Even though he loves and wants to hold onto his
world as it is, he finally understands that if one man was inspired to fly by studying
the birds, it is only a matter of time before another man will do the
same.

The Emperor would rather hold onto his peaceful way
of living rather than enjoy the beauty and benefits that come with advancement. However,
progress cannot be stopped, though this is what the Emperor in the story has tried to
do.