Playing the flute, what key should I use for Lillian Yip's "Shanghai Tang"?

Ye Liyi's "Shanghai Tang" is in the key of C. If you use software to raise this music to the key of G, it should be raised by 3 semitones (which is 7 semitones) or lowered by 2 semitones (which is 5 semitones), but this is not a solution to the problem, because, when raising or lowering the key of an original piece of music by too much, the music is very difficult to listen to (because of the change in frequency), and software should not be used to deal with the raising or lowering of keys by more than 2 at the most! The maximum number of keys that should be processed with software is 2. Go ahead and play it on a flute in the key of C. Depending on what key the accompaniment is in, of course. Just for reference.