Hello, I will be landing at Shanghai Pudong Airport next November 12th around 10:00 am.

I need to purchase tickets for train Subway line 2 east Extention line with change in Guanglan Road for final destination Songhong Road. During my stay I will also use subway line 2 for my business appointments. I will return on November 15th from hotel to Pudong airport with the same train. Is there a ticket I can buy that allow me to use subway for 4 days? or should I buy the tickets every days? Can I buy at the airport all the tickets I need? Can I use credit cards for purchasing or should I consider cash only/also?
Sorry for so many questions