1. Open Meitu Xiu Xiu App on your mobile phone (there is no such software to download in the App Store), and then click the "Plum Blossom Map" option on the main page.

2. Next, select and click a picture where you need to write fluorescent words.

3. On the picture editing page, slide the toolbar below to the right to find the "graffiti pen" and click it.

4. Select a brush to write words on the picture, and then click the √ symbol in the lower right corner.

5. After editing the picture, click "Save/Share" in the upper right corner to see the picture in the mobile phone photo album.