I usually find cash annoying, but as the fares are so ludicrously cheap (3-6 yuan), when I was there I didn't find it so much of an issue. One thing that I did

I usually find cash annoying, but as the fares are so ludicrously cheap (3-6 yuan), when I was there I didn't find it so much of an issue. One thing that I didn't like about the Shanghai metro was the fact that it closes at like 11pm, but other then that it was a very good experience