SIM card advice and day trips! :) (Shanghai)

Hi Everyone!

I'm taking my first trip to Shanghai in 1 week and I'm really excited ! I couldn't find any precise info on the 2 things in my subject - so I thought I would check here ...

- Can I buy a prepaid SIM card for simple local calling and messaging at the Shanghai Pudong Airport? Any idea on costs?

- Would you recommend any day trips around Shanghai - Protected content by train/car?

I will be there for 10 days!
Thanks!!