When you arrive in Shanghai at 9: 00 on the first day, you'd better book a hotel in advance. Generally, it can be considered near Nanjing Road. Because you said it would be cheap, you should look for a chain hotel like Hanting or Home Inn, because the price is fixed and not too expensive.

So you can go directly to Nanjing Road when you arrive at the hotel on the first day. Nanjing Road can go directly to the Bund. You can have dinner on Nanjing Road and then walk to the Bund. If it's not too late, you can go to Wujiang Road. There were many snacks, and the first night passed like this.

The next morning, I set off for Chenghuang Temple, which is a place to sell food. If I want to visit, I will sell tickets for Yu Garden, which is a round landscape. If I can't get in by myself, the Chenghuang Temple can consider going to the Lubo Gallery, a state-owned time-honored brand with moderate price but real weight. Besides, if I have to eat snacks, don't go to the one with a store. Visiting the Chenghuang Temple is very tiring, but there is actually nothing to play after that, because Pudong is not included. If you are still in the mood after visiting the Chenghuang Temple, go to the People's Square. Anyway, Nanjing Road-Bund-Chenghuang Temple is not far away.