If you want to be an agent for Douyin Express to promote the app, you can use the following methods:

1. Join the promotion cooperation plan of Douyin Express. You can find relevant information about the promotion cooperation plan on the official website of Douyin Express and join it to obtain the agency rights of Douyin Express.

2. Contact the business department of Douyin Express. You can obtain contact information through the official website of Douyin Express, contact the business department of Douyin Express, apply for agency and understand the relevant agency policies.

3. Use your own resources to promote the app. If you have a lot of resources and channels, you can contact Douyin Express directly, win the agency rights, and then use your own resources to promote the app.

In addition, agents of Douyin Express also need to have an in-depth understanding of the market, master the skills of promoting the app, and have sufficient personnel, financial and material resources to ensure smooth promotion and good results.