Trying to define boredom depends on what your interests are. For example, I visited Suzhou only once in my life when it wasn't obligatory and didn't really find the cultural sights to be my thing. I left there feeling like the most exciting thing was the train ride, and if that's the case then might as well take the faster maglev. On the other hand, it's been at least 9 years and I can't say I ever thought of using the word "boredom" to describe Shanghai.