Douyin is a short video social platform. Its dissemination principles and rules mainly include the following points:

1. Algorithm-driven: Douyin's recommendation algorithm is the key to its dissemination. Douyin recommends content that users are interested in by analyzing users' viewing time, likes, comments, sharing and other behavioral data, thereby achieving accurate dissemination.

2. Visual impact: Douyin's video content is short, creative and visually impactful, which can quickly attract users' attention.

3. Social dissemination: Douyin's social attributes are also an important factor in its dissemination. Users can follow and interact on Douyin to promote the dissemination of videos in social networks.

4. Topic leadership: Douyin stimulates users' enthusiasm for participation through hot topics and challenges, thereby promoting the dissemination of content.

5. Personalization and diversification: The content on the Douyin platform is rich and diverse, covering multiple fields such as life, entertainment, knowledge, skills, etc., to meet the needs of different users.

6. Adapting to user needs: Douyin continuously optimizes product experience and improves user satisfaction, thereby retaining users and achieving long-term content dissemination.

In terms of dissemination principles, Douyin focuses on content quality and user experience, encourages innovative and personalized content, and also requires users to abide by laws and regulations and not publish illegal or illegal content. Through these principles, Douyin has achieved efficient and accurate dissemination effects.