当当在美国上市的招股说明书,可详细了解当当的有关信息。

Experts Where You Can Find Additional Information Index to Consolidated Financial Statements

You should rely only on the information contained in this prospectus or in any related freewriting prospectus. We have not authorized anyone to provide you with information different from that contained in this prospectus. We are offering to sell, and seeking offers to buy, the ADSs only in jurisdictions where offers and sales are permitted. The information contained in this prospectus is current only as of the date of this prospectus, regardless of the time of delivery of this prospectus or of any sale of the ADSs. We have not taken any action to permit a public offering of the ADSs outside the United States or to permit the possession or distribution of this prospectus outside the United States. Persons outside the United States who come into possession of this prospectus must inform themselves about and observe any restrictions relating to the offering of the ADSs and the distribution of the prospectus outside the United States. Until January 1, 2011 (the 25th day after the date of this prospectus), all dealers that buy, sell or trade ADSs, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the obligation of dealers to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions. i Table of Contents

PROSPECTUS SUMMARY The following summary is qualified in its entirety by, and should be read in conjunction with, the more detailed information and financial statements appearing elsewhere in this prospectus. In addition to this summary, we urge you to read the entire prospectus carefully, especially the risks of investing in our ADSs discussed under "Risk Factors," before deciding whether to buy our ADSs. This prospectus contains information from a consumer survey commissioned by us and conducted by iResearch Consulting Group, or iResearch, an independent market research firm, in May 2010 to provide information on our position in the business-to-consumer e-commerce market in China. Our Business We are a leading business-to-consumer, or B2C, e-commerce company in China. Our brand is the number-one ranked brand among China's B2C e-commerce companies for awareness, trusted online shopping experience and price-competitiveness, according to a consumer survey conducted by iResearch in May 2010 at our request. Since our inception, we have focused on selling books online. Based on publicly available information, we believe that we are the largest book retailer in China in terms of revenues. As of September 30, 2010, we offered approximately 590,000 book titles on our website, including more than 570,000 Chinese language titles, which we believe is the largest selection of Chinese language titles available both online and offli

ne from a single retailer in China. We also offer other media products and selected general merchandise categories on our website, including beauty and personal care products, home and lifestyle products, and baby, children and maternity products. In July 2009, we launched the marketplace program, which allows third-party merchants to sell their general merchandise products alongside our products. We have developed a large and loyal customer base through our continuing focus on creating an enjoyable online shopping experience for our customers. We had six million active customers in 2009. Our average daily unique visitors increased from approximately 910,000 in 2009 to 1,240,000 in the nine months ended September 30, 2010. Our average daily unique visitors further increased to 1,610,000 in September 2010. In the three months ended December 31, 2007, 2008 and 2009 and the