We arrive at Pudong aiport 7.30 am. What is he best way to get to our Hotel the Grand Mercure in Shanghai

For the hotel, there are three Grand Mercure in that city. They are Grand Mercure SH Zhongya, Grand Mercure SH Hongqiao and Grand Mercure SH Baolong. Which one do you refer to?
To reach the on at Hongqiao, you can take the local subway line 2 to reach Loushanguan Road Station where you can change to take a taxi to reach your hotel directly.
To reach the Grand Mercure SH Zhongya, you can take the airport shuttle bus line 5 to reach the local railway station and then you can easily find that hotel.