To log in to Doudian, you first need to register on Feige's official website and apply to become a Doudian merchant, then download and log in to the Doudian APP, enter the corresponding account and password to log in. On the Doudian platform, merchants can publish their own products, manage orders, conduct marketing and promotion, etc. At the same time, Doudian also provides a wealth of data analysis and customer service tools to help merchants better operate and manage their e-commerce business. Therefore, it is very convenient and fast to log in to Doudian through Feige, allowing merchants to easily enter the Douyin e-commerce field and open up more sales channels and opportunities.