(These places are the same, Lujiazui and Binjiang Avenue are free, and the Oriental Pearl+Aquarium has a joint ticket, which is about 100 yuan/person. )
First day afternoon+evening: People's Square Museum on the Bund of Nanjing East Road.
(Take subway line 2 from Lujiazui, two stops to People's Square, the subway ticket is 3 yuan/person, and the museum is in the People's Square area. If you have a student ID card, you can buy a ticket for 5 yuan/Guangzhou and an adult ticket for 20 yuan/Guangzhou, and then walk west along Nanjing Road to get to the Bund. It is best to visit Nanjing East Road and the Bund in the evening. )
The next morning: Yuyuan Town God Temple Shanghai Old Street
(Admission to Yuyuan Garden is 45 yuan/person, and Shanghai Old Street in Chenghuang Temple is free. )
The next day noon+afternoon: Xujiahui