Judged by id. According to the official Douban website, ID is a unique identification mark for each account, which is used to identify the identity. If Douban uses the same avatar and name, it does not necessarily mean that it is the same person, but the same ID means it must be the same person. Douban is a community website founded on March 6, 2005. The website started with books, movies, music and other works. It provides information about books, movies, music and other works. Both descriptions and comments are provided by users.