Is foreign country student pass valid to purchase student ticket for expo park? Where can I buy? as well as for senior ticket?

Where can I make a reservation entry for china pavillion? is it outside entrance park or china pavillion?

What time should I line for visiting china pavillion that possible I can get 5 reservation ticket?

2 seniors and 2 children with me will visit Shanghai expo end of August, which hotel will you recommend? we go there only for visit Shanghai expo for 6 night.

Thank