If this article has been posted, sorry I missed it .... but this almost sounds like a conspiracy theory that the Taiwanese fans are the one's who sent pictures to China, trying to get those shows cancelled so that the band would after 20 years come back to Taiwan. Sounds far fetched but if it's so - some would call the typhoon karma..... (Which I don't believe in btw).

http://www.bbc.com/news/blogs-china-blog-34345379