This is an example sentence. We introduce a web document editor. Mong9 Editor provides users with the ability to create and modify responsive web documents easily, even without coding skills. Users can write documents in real-time and instantly preview the results using the convenient WYSIWYG editor. Mong9 Editor comes with over 100 pre-built responsive sample blocks, allowing users to select and arrange blocks effortlessly through drag-and-drop or double-clicking. These blocks are preconfigured for responsiveness, ensuring flawless display on mobile devices. Moreover, the provided sample blocks comply with web accessibility guidelines, helping users maintain web accessibility. The editor offers a variety of settings panels, empowering users to freely modify objects and achieve their unique designs. This enables a diverse and personalized web document creation experience.