Hello, the whole week you stay there will be the national holiday, at that time, restaurants, shops and other facilities will not be closed, since most of the people in China are on their vacation and this is a good time for promotion of the stores and shopping malls. You can tour around Shanghai but actually it would be crowded there since it is the holiday, the Bund, Happy Valley, City God Temple, Yuyuan Garden, you can also tour around other cities in this area such as Suzhou, Hangzhou Nanjing.