Shanghai can give you the following suggestions.

Lujiazui, Pudong, you can go to Oriental Pearl, World Financial Center and Jinmao Building (only once). There is also a marine aquarium. If you are interested in these, you can go there. There is also a riverside avenue in Pudong, facing the Bund across the river, which is a good place to see the night scene. Food can be placed in Zheng Da Square and Guo Jin Center, and snacks are provided for dinner. It should be enough not to play in the aquarium for half a day.

Puxi can be the Bund (old building)+Nanjing East Road Pedestrian Street (shopping, where there is a wax museum)+Yuyuan Garden (old house in Shanghai)+Xintiandi (Shikumen, old alley). There is food in these places. Just search for a gourmet app. One day is almost enough.

Xujiahui business circle, you can go to Tianzifang first, eat a lot, and there is the Sun and Moonlight Center next to it. Then there is Xujiahui, where there is a Guangqi City and Xujiahui Church. Many people will take wedding photos. Then we can go to Qibao Street. I think I need it for a day.

You can also go to Nanxiang Ancient Town, Guyi Garden or Zhujiajiao in Qingpu, because it is far away, and it is estimated that one day is also important.

If you like amusement, you can spend a day in Happy Valley in Sheshan.

Just remembered, if you want to see the stars, you can go to the car pier, but you'd better know what movie is being filmed in advance, so as not to catch the air.