I've got some info at eclipsers.ca about the weather along the eclips track, and as it really seems rather a small chance of clear sky, and also hot and sticky weather, not so nice to go siteseeing the rest of Shanghai area / China, so I've decided to give it a miss, this time. Pity, but thanks anyway everyone for reacting. And hope for all who live in the path, that you'll see a great eclips anyway.
Stardust