WeChat is a new media because, as a social platform, it has a strong communication capability and can publish all kinds of information, including text, pictures, videos, voice, etc., and also has the opportunity to interact with other users. As a social media, WeChat relies on the communication channels provided by the platform, so it belongs to the category of new media. Douyin belongs to self-media because it is a short video platform where users can independently produce and publish short video content, independently create and disseminate, and do not rely on the platform's communication channels, so it belongs to the category of self-media. In short, WeChat is a new media based on social relationships, while Douyin is a self-media based on personal creation.