Where can I find something delicious in Shanghai?

I have been to Shanghai once and stayed in a hotel in People's Square with my good friends. The hotels there are not so good and the prices are not cheap, probably because of the downtown. I think the food in Yunfu fried dumpling shop (next to raffles city) on Fuzhou Road is very good and affordable, which can be said to be affordable and delicious. Then the consumption in Shanghai is really high.