Firstly, this is a very chunky guide but then China is a vast country, so at the price of heaving this around in your bag, you'll have a comprehensive, lavishly illustrated book which contains chapters on all of the provinces with lots of information on the larger cities, Beijing, Shanghai, Hong Kong etc as well as their surrounding areas.
The front of the book is divided into sections which give a marvelous introduction to the country - for example, Landscape and Wildlife, Arts, Architecture, Religion and Philosophy, History (including a dynasty timeline) and more.
The back of the book contains many pages of practical information, including accommodation, travel arrangements, places to eat etc.
The main attraction of the eyewitness books are their fantastic illustrations which really bring a country to life before you've even traveled. For a two week trip covering Shanghai, Xi'an and Beijing I found this guide to be superb.