I would like to ask about the travel, accommodation and consumption from Nanjing to Shanghai.

There are bullet trains and many more. In fact, food and accommodation are not expensive, just like Nanjing, unless you want a star. You can stay (such as Nanjing Road, Guizhou Road, Suzhou Road, etc. There are many roads nearby. There are many hotels there. 150 yuan is spacious, clean and safe for one night. The double standard rooms, air conditioning and hot water are quasi-three-star, but I just can't express them. I have friends to visit, and it's affordable to take them to this kind of shop. 5000 yuan is enough for two people to play in Shanghai. Have fun,