To write and save a novel online, you need to choose an online platform that can write novels, such as Qidian Chinese Network, Genesis Chinese Network, etc. Then you need to register an account and log in to your account. Next, you can start writing your novel. During the process of writing a novel, you need to choose a location to save the novel. Usually, you can choose to save the novel on your local computer or upload it to the "local" server in the online platform. When uploading a novel, you need to choose a format to save the novel and set the path to save the novel. After you finish writing your novel, you need to submit it to the online platform. When submitting the novel, you need to fill in the basic information of the novel, including the name of the novel, the name of the author, and the introduction of the novel. After submitting, your novel will enter the online platform's "pending review" status and wait for the platform to review it. Once your novel passes the review, you can publish the novel on the platform and own the copyright of the novel. You can publish the novel on different platforms such as Qidian Chinese Network, Genesis Chinese Network, etc. You can also publish the novel on your own website.