Baidu publishes its book search at http://book.baidu.com/. You can search many Chinese books from several online book stores. But there is only little info about the book, such as author, press, content menu and order links, you can’t read any page or comment it at Baidu. So it can’t compete with Google book search and douban.com (en), the leader book search in China. Just an aggregate search engine of several online book stores I think, and you can’t compare the price between the stores, only one order link of one book. So bad.