there's too much written on it ~ ~ ~ for your reference.
I have just returned from a trip to Shanghai, and I think there are several places worth visiting. You can choose the route like this (for reference only, I visited it like this and thought it was good).
starting point: on Nanjing road, you can take the subway. When you get there, you can walk all the way to the Bund. Nanjing Road is a shopping place, like Wangfujing in Beijing. Things are more expensive, but I think the buildings in Shanghai are very distinctive, and Nanjing Road is one of them. You don't have to visit all the shopping malls, but you must see the buildings.
if you walk all the way, it's the bund. You can walk slowly. If you leave at 11 a.m., it will be around 12 a.m.. You can see the Oriental Pearl on the Bund, and you can take photos or something. Then I crossed the river. There are several ways: first, there is a tunnel, which costs 45 yuan, and there is nothing meaningful in it. I don't recommend you to do it. The second is to take the subway, but when I take it, people are super crowded, so be careful in the subway. The third is by boat, which is more affordable, 51 cents a person. But it's a long walk along the Bund. By the way, you must not wear high heels when visiting Shanghai. Even wearing slippers will kill you, hehe.
Then we will see the Oriental Pearl and Jinmao Tower. The two are relatively close. However, I don't think it's necessary to go up both, but the last one will do. My suggestion is Jinmao Tower, which has a post office on the 88th floor. It is the highest post office in the world. You can buy greeting cards and send them to people you like. It is very meaningful, but greeting cards and stamps are more expensive.
There is an aquarium next to the Oriental Pearl. You can also visit it.
in the evening, there are cruise ships. Generally, it takes 1 hours to swim along the Huangpu River, and boats that cost more than 81 yuan an hour are ok, but those below are not so good. And you should prevent being cheated when you take a boat.
it is estimated that it will take 1 days to go back and forth. I hope I can help you ~ ~ ~
The other place worth visiting is Xintiandi, where there are many foreign restaurants, bars and discos, and many foreigners are very lively at night ~ Besides, the ancient architectural style is preserved there, which is worth visiting. It is recommended to go around 2 pm and play until the evening ~ ~ ~
Have a good holiday.