Among the many Web 2.0 sites today, Douban is considered a bit unconventional. With just a few tech personnel and no marketing or promotion whatsoever, it can easily achieve millions of visitors. Moreover, it boasts such highly engaged users that any social networking site would be envious. Back in the day, I saw potential in two websites: Douban and Tudou. Now, Tudou has a lot of competitors, but Douban still leads by a wide margin, with its pursuers nowhere to be seen. Nowadays, the entire internet industry has begun to study Douban as a phenomenon. Why has it been so successful? Even Tianya regards Douban as a future competitor, despite Tianya's own lackluster profitability (Tianya doesn't even consider Mop as competition). Yet they take Douban so seriously that they've conducted specific research on it. Douban's development potential is limitless!