It is impossible to give a clear conclusion because the Doudian customer ID refers to the user ID on the Doudian platform. You need to log in to the Doudian Seller Center and view the detailed information of each customer, including the customer ID, in the customer management module. Therefore, the specific search methods and steps will vary for different sellers and accounts. You can refer to the relevant tutorials or help documents provided by Doudian customer service or the platform, or ask other sellers in the Doudian seller community. In addition to viewing the customer ID on the Doudian platform, sellers can also obtain the customer ID through other means, including attracting customers and obtaining customer information through promotional links, discount codes, etc. At the same time, more accurate marketing and services can be provided to customers by analyzing data such as customer behavior and purchase records.