Our plane arrives in Shanghai Pudong International Airpot by 11;45 pm. We would probably get out past 12 midnight already. Up to what time are the subway trains? How much is the subway from the airport to Salvo Hotel in Huangpu District? Are the subway lines accessible from the airport? Is it safe to walk in the area of the hotel by the time we get there? This would be May 25,2011.