2. Then enter "all-in-one software" or "xtjssb" in the search box and click Search.

3. Then find the official WeChat account or personal account of "Heart Software" in the search results, and click Enter.

4. Then click the plus sign in the upper right corner and select "Add to Address Book" or "Add as Friend".

5. Finally, follow the prompts and wait for the other party to pass the verification.