When you get China, what kind of things you need to do?

Okay, I going to China for vacation and toursim, like sightseeing, and just staying there for a week. Do they will ask me why I am doing here for? Do i need anymore paper work or prove like touring package? and what if i do not in a tour group, and i just want to go on my own sightseeing, will they let me through?

thank you