1. Password change: First, make sure that your password is strong, including letters, numbers and special characters, and the length is not less than 8 digits. If your password is too simple or easy to guess, Douban system may think it is risky and prompt you to change your password.
2. Check account security settings: After logging into your Douban account, check account security settings to ensure that your account has not been tampered with by others or bound to other devices. If there is any abnormality, unbind and modify the password in time.
3. Update Douban application: If you are using Douban's mobile application to publish rental information, please try to update the application to the latest version to ensure that you are using a secure version.
4. Clean up the browser cache: Sometimes, the browser cache may cause problems with account information. Try to clear the browser cache, and then log in to Douban account again to see if the problem is solved.
5. Contact Douban customer service: If the above methods still fail to solve the problem, it is recommended to contact Douban customer service team, ask them about specific account risks and seek their help and suggestions.
Please note that the above methods are for reference only, and the specific solutions can be different according to individual circumstances. If the problem still exists, it is recommended to seek professional help.