To post your niece's essay online, you can refer to the following steps: 1. Decide which platform to publish to, such as Zhihu, Weixin Official Accounts, website, etc. 2. upload the essay to the corresponding platform and apply for publication. On the platform, one needed to fill in relevant information such as the title of the essay, author information, description, and so on. 3 After publishing, you need to set keywords so that search engines can better search for the essay. The keywords could be selected according to the content and theme of the essay, or set according to the rules of the platform. 4. After the publication, the essay needs to be maintained and updated regularly to ensure that it can maintain a good state and appeal. This could be achieved by posting updates, comments, likes, and so on on the platform. 5. If the essay has obtained the copyright of other platforms or websites, you need to negotiate with the platform or website about the copyright matters and obtain the corresponding authorization. Posting essays required compliance with the rules of the platform and website, as well as consideration of their own safety and legitimacy.