The App of Haitang Bookstore may be an application in a specific region or platform, and may be downloaded from the app store or official website. You can try to find and download the Haitang Bookstore App through the following steps:

1. Open the app store on your phone or computer: for example, the app store (Apple phone), Google Play store (Android phone) or Microsoft store (Windows computer).

2. Enter "Haitang Bookstore" in the search bar of app store.

3. Browse the search results and find the application icon and name that match the application of Haitang Bookstore. Be sure to choose an officially provided application.

4. Click the application icon or name to enter the application page.

5. On the application page, check the description, evaluation and user feedback of the application to learn more about the application.

6. If you are satisfied and decide to download the application, click the "Download" or "Install" button and follow the prompts to complete the download and installation process.

When choosing to download and install an application, you must download it from a trusted source to ensure the security and reliability of the application. In addition, pay attention to check and abide by the terms of use and privacy policy of the application to protect your personal information and equipment security.

If you can't find the app of Haitang Bookstore in the app store, you can try to find official website of Haitang Bookstore through the search engine and download the app from official website. Please pay attention to ensure reliable sources and high security when downloading and installing applications.

Remember, the specific download process may vary depending on your device type, geographical location and platform requirements. Therefore, it is best to refer to the guidance on the app store or the relevant information provided by the official website of Haitang Bookstore to obtain accurate and up-to-date download methods.