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I've only seen it in Hangzhou and Shanghai so far. Apparently they also have it in Beijing, Guangzhou, Nantong and Wuhan...and Shenzhen! Seriously, this cake is addicting. Track it down and try it. The white chocolate butterscotch one is my favourite - anndd the mille chocolate crepe. But honestly they are all good. If you try it, let me know what you think!