1. Search App Store: Open your smartphone and enter the App Store.

2. Search for used cars in the red lobby: enter "used cars in the red lobby" or related keywords in the search bar of the app store.

3. Select an application: find the application of Hongluobei used car in the search results, and click to enter the application details page.

4. Download and install: Click the "Download" or "Install" button to complete the download and installation process according to the prompts.