CNKI电子图书库-CNKI-EBooks
A full text database of Chinese books from some of the major publishing houses. Can read online and download. 

Du Xiu (读秀）

A database of over 2 million books and other scholarly sources published in China mostly after 1949. The database is full text searchable, with sample reading of the first 20 or so pages. For full text access, the user can make an online request (50 pages of any given book per week) and receive almost instant delivery.