I will be in Canton Fair for all the three phases. However I want to take 2 days off to see Shanghai. Any recommended memorable attractions? Do you recommend I take a cab to the sites myself or just hire a tour guide? If you recommend a tour guide, where or how do I get one? Can I get a tour guide from the hotel I will be staying in or from the airport? And which region is much closer to Harbin, Shanghai or Guangzhou?