The Douyin account starting with nrd is a Nanjing family. According to the user regulations of the Douyin platform, the first two digits of the Douyin account will display the geographical location information. Therefore, the "nr" at the beginning of the Douyin account nrd is the transliteration abbreviation of Nanjing, so it can be inferred that nrd is a Nanjing family. In addition to nrd, there are other Douyin accounts that start with the city or region they are located in, such as bjd (Beijing family), hhd (Yellow River family), etc., which also provides some reference for users to judge other families.