To mark stores on the map, you can use the Amap Map APP. Take the Huawei P20 mobile phone as an example:

1. Open the standby desktop of the mobile phone, find and click the Amap Map APP.

2. After entering the main page of the software, find and click the avatar logo in the upper left corner.

3. In the new page, click "More" under the toolbox column.

4. After entering the new page, find and click "Business Annotation".

5. In the new page, click "Add my store" and then follow the page prompts.

Notes:

1. When using Huawei P20 mobile phone to mark a store on the Amap map, be sure to ensure the security of your account and password. Do not disclose it to avoid unnecessary losses.

2. When using Huawei P20 mobile phone to mark a store on the Amap map, you must ensure the security and stability of the network.

3. When using Huawei P20 mobile phone to mark a store on the Amap map, be sure to follow the instructions.

4. If you don’t know how to mark a store on the Amap map of Huawei P20 mobile phone, you must contact professional personnel for processing as soon as possible.