from seventh heaven hotel, how to reach pudong airport using subway and meglav ?

From your hotel, you can walk to the People's Square Station to take the subway line 2 to reach the Pudong airport directly.
If you want to use the maglev train, you can take the line 2 to Longyang Road Station and then change to Maglev to airport.

If you plan to use the subway for the whole journey, it takes around one hour and forty minutes. The subway fare is around 7RMB.
If you plan to use maglev + subway, the whole line costs around 40 minutes. The fare is around 54RMB per ticket.